/usr/share/xflr5/Guidelines.pdf is in xflr5-doc 6.07+svn513-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/xflr5/../doc/xflr5-doc/Guidelines_v604.pdf
/usr/share/xflr5/../doc/xflr5-doc/Guidelines_v604.pdf