/usr/lib/x86_64-linux-gnu/libpoppler-glib.so.8 is in libpoppler-glib8 0.62.0-2ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libpoppler-glib.so.8.9.0
/usr/lib/x86_64-linux-gnu/libpoppler-glib.so.8.9.0