/usr/share/icons/gnome/scalable/places/ is in gnome-icon-theme-symbolic 3.12.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/icons/gnome/scalable/places/folder-documents-symbolic.svg
/usr/share/icons/gnome/scalable/places/folder-download-symbolic.svg
/usr/share/icons/gnome/scalable/places/folder-music-symbolic.svg
/usr/share/icons/gnome/scalable/places/folder-pictures-symbolic.svg
/usr/share/icons/gnome/scalable/places/folder-publicshare-symbolic.svg
/usr/share/icons/gnome/scalable/places/folder-remote-symbolic.svg
/usr/share/icons/gnome/scalable/places/folder-saved-search-symbolic.svg
/usr/share/icons/gnome/scalable/places/folder-symbolic.svg
/usr/share/icons/gnome/scalable/places/folder-templates-symbolic.svg
/usr/share/icons/gnome/scalable/places/folder-videos-symbolic.svg
/usr/share/icons/gnome/scalable/places/network-server-symbolic.svg
/usr/share/icons/gnome/scalable/places/network-workgroup-symbolic.svg
/usr/share/icons/gnome/scalable/places/start-here-symbolic.svg
/usr/share/icons/gnome/scalable/places/user-bookmarks-symbolic.svg
/usr/share/icons/gnome/scalable/places/user-desktop-symbolic.svg
/usr/share/icons/gnome/scalable/places/user-home-symbolic.svg
/usr/share/icons/gnome/scalable/places/user-trash-symbolic.svg