/usr/share/kde4/apps/kwin/desktoptabbox/ is in kde-window-manager-common 4:4.11.8-0ubuntu6.
This file is owned by root:root, with mode 0o755.
..
/usr/share/kde4/apps/kwin/desktoptabbox/informative/
/usr/share/kde4/apps/kwin/desktoptabbox/informative/contents/
/usr/share/kde4/apps/kwin/desktoptabbox/informative/contents/ui/
/usr/share/kde4/apps/kwin/desktoptabbox/informative/contents/ui/ShadowedSvgItem.qml
/usr/share/kde4/apps/kwin/desktoptabbox/informative/contents/ui/main.qml
/usr/share/kde4/apps/kwin/desktoptabbox/informative/metadata.desktop
/usr/share/kde4/apps/kwin/desktoptabbox/previews/
/usr/share/kde4/apps/kwin/desktoptabbox/previews/contents/
/usr/share/kde4/apps/kwin/desktoptabbox/previews/contents/ui/
/usr/share/kde4/apps/kwin/desktoptabbox/previews/contents/ui/ShadowedSvgItem.qml
/usr/share/kde4/apps/kwin/desktoptabbox/previews/contents/ui/main.qml
/usr/share/kde4/apps/kwin/desktoptabbox/previews/metadata.desktop