/usr/share/doc/dvdisaster/manual.pdf.gz is in dvdisaster-doc 0.79.5-5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/dvdisaster/../dvdisaster-doc/manual.pdf.gz
/usr/share/doc/dvdisaster/../dvdisaster-doc/manual.pdf.gz