/usr/share/doc/libtiff-dev/changelog.Debian.gz is in libtiff-dev 4.0.9-5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libtiff-dev/../libtiff5/changelog.Debian.gz
/usr/share/doc/libtiff-dev/../libtiff5/changelog.Debian.gz