This file is indexed.

/usr/lib/unity-2d/plugins/panel/libpanelplugin-legacytray.so is in unity-2d-panel 5.10.0-0ubuntu1.

This file is owned by root:root, with mode 0o777.

It is a symlink to /usr/lib/unity-2d/plugins/panel/libpanelplugin-legacytray.so.0.0