/usr/lib/ is in libsort-key-perl 1.33-1+b3.
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/perl5/5.24/
/usr/lib/x86_64-linux-gnu/perl5/5.24/Sort/
/usr/lib/x86_64-linux-gnu/perl5/5.24/Sort/Key/
/usr/lib/x86_64-linux-gnu/perl5/5.24/Sort/Key/Maker.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Sort/Key/Multi.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Sort/Key/Natural.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Sort/Key/Register.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Sort/Key/Types.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Sort/Key.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/auto/
/usr/lib/x86_64-linux-gnu/perl5/5.24/auto/Sort/
/usr/lib/x86_64-linux-gnu/perl5/5.24/auto/Sort/Key/
/usr/lib/x86_64-linux-gnu/perl5/5.24/auto/Sort/Key/Key.so