/usr/share/themes/Greybird-compact/xfwm4/menu-pressed.png is in greybird-gtk-theme 3.22.8-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/themes/Greybird-compact/xfwm4/menu-active.png
/usr/share/themes/Greybird-compact/xfwm4/menu-active.png