/usr/share/doc/ubuntu-packaging-guide-html-uk/singlehtml/_static/images/cc-by-sa.png is in ubuntu-packaging-guide-html-uk 0.3.8.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/ubuntu-packaging-guide-html-uk/singlehtml/_static/images/../../../../../ubuntu-packaging-guide/_static/images/cc-by-sa.png