/usr/lib/ is in libgtk2-perl 2:1.2492-4.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/perl5/
/usr/lib/x86_64-linux-gnu/perl5/5.20/
/usr/lib/x86_64-linux-gnu/perl5/5.20/auto/
/usr/lib/x86_64-linux-gnu/perl5/5.20/auto/Gtk2/
/usr/lib/x86_64-linux-gnu/perl5/5.20/auto/Gtk2/Gtk2.so
/usr/lib/x86_64-linux-gnu/perl5/5.20/Gtk2.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Gtk2/
/usr/lib/x86_64-linux-gnu/perl5/5.20/Gtk2/Helper.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Gtk2/Pango.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Gtk2/Gdk/
/usr/lib/x86_64-linux-gnu/perl5/5.20/Gtk2/Gdk/Keysyms.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Gtk2/Install/
/usr/lib/x86_64-linux-gnu/perl5/5.20/Gtk2/Install/gdk.typemap
/usr/lib/x86_64-linux-gnu/perl5/5.20/Gtk2/Install/gtk.typemap
/usr/lib/x86_64-linux-gnu/perl5/5.20/Gtk2/Install/doctypes
/usr/lib/x86_64-linux-gnu/perl5/5.20/Gtk2/Install/gtk2perl.h
/usr/lib/x86_64-linux-gnu/perl5/5.20/Gtk2/Install/Files.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Gtk2/Install/gtk2perl-versions.h
/usr/lib/x86_64-linux-gnu/perl5/5.20/Gtk2/Install/gtk2perl-autogen.h
/usr/lib/x86_64-linux-gnu/perl5/5.20/Gtk2/Install/gtk2perl.typemap
/usr/lib/x86_64-linux-gnu/perl5/5.20/Gtk2/SimpleList.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Gtk2/TestHelper.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Gtk2/SimpleMenu.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Gtk2/CodeGen.pm