/usr/lib/x86_64-linux-gnu/libpresage.so is in libpresage-dev 0.9.1-2.1ubuntu4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libpresage.so.1.1.1
/usr/lib/x86_64-linux-gnu/libpresage.so.1.1.1