/usr/lib/x86_64-linux-gnu/libpaper.so.1 is in libpaper1 1.1.24+nmu5ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libpaper.so.1.1.2
/usr/lib/x86_64-linux-gnu/libpaper.so.1.1.2