/usr/share/mimelnk/ is in libreoffice-common 1:3.5.2-2ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/mimelnk/application/
/usr/share/mimelnk/application/libreoffice-drawing-template.desktop
/usr/share/mimelnk/application/libreoffice-drawing.desktop
/usr/share/mimelnk/application/libreoffice-extension.desktop
/usr/share/mimelnk/application/libreoffice-formula.desktop
/usr/share/mimelnk/application/libreoffice-master-document.desktop
/usr/share/mimelnk/application/libreoffice-ms-excel-sheet-12.desktop
/usr/share/mimelnk/application/libreoffice-ms-excel-sheet-binary-12.desktop
/usr/share/mimelnk/application/libreoffice-ms-excel-sheet.desktop
/usr/share/mimelnk/application/libreoffice-ms-excel-template-12.desktop
/usr/share/mimelnk/application/libreoffice-ms-powerpoint-presentation-12.desktop
/usr/share/mimelnk/application/libreoffice-ms-powerpoint-presentation.desktop
/usr/share/mimelnk/application/libreoffice-ms-powerpoint-template-12.desktop
/usr/share/mimelnk/application/libreoffice-ms-word-document-12.desktop
/usr/share/mimelnk/application/libreoffice-ms-word-document.desktop
/usr/share/mimelnk/application/libreoffice-ms-word-document2.desktop
/usr/share/mimelnk/application/libreoffice-ms-word-template-12.desktop
/usr/share/mimelnk/application/libreoffice-oasis-database.desktop
/usr/share/mimelnk/application/libreoffice-oasis-drawing-template.desktop
/usr/share/mimelnk/application/libreoffice-oasis-drawing.desktop
/usr/share/mimelnk/application/libreoffice-oasis-formula.desktop
/usr/share/mimelnk/application/libreoffice-oasis-master-document.desktop
/usr/share/mimelnk/application/libreoffice-oasis-presentation-template.desktop
/usr/share/mimelnk/application/libreoffice-oasis-presentation.desktop
/usr/share/mimelnk/application/libreoffice-oasis-spreadsheet-template.desktop
/usr/share/mimelnk/application/libreoffice-oasis-spreadsheet.desktop
/usr/share/mimelnk/application/libreoffice-oasis-text-template.desktop
/usr/share/mimelnk/application/libreoffice-oasis-text.desktop
/usr/share/mimelnk/application/libreoffice-oasis-web-template.desktop
/usr/share/mimelnk/application/libreoffice-openxmlformats-officedocument-presentationml-presentation.desktop
/usr/share/mimelnk/application/libreoffice-openxmlformats-officedocument-presentationml-template.desktop
/usr/share/mimelnk/application/libreoffice-openxmlformats-officedocument-spreadsheetml-sheet.desktop
/usr/share/mimelnk/application/libreoffice-openxmlformats-officedocument-spreadsheetml-template.desktop
/usr/share/mimelnk/application/libreoffice-openxmlformats-officedocument-wordprocessingml-document.desktop
/usr/share/mimelnk/application/libreoffice-openxmlformats-officedocument-wordprocessingml-template.desktop
/usr/share/mimelnk/application/libreoffice-presentation-template.desktop
/usr/share/mimelnk/application/libreoffice-presentation.desktop
/usr/share/mimelnk/application/libreoffice-spreadsheet-template.desktop
/usr/share/mimelnk/application/libreoffice-spreadsheet.desktop
/usr/share/mimelnk/application/libreoffice-text-template.desktop
/usr/share/mimelnk/application/libreoffice-text.desktop