/usr/lib/libqxcppunitd.so is in libqxcppunit-dev 0.9.2-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libqxcppunitd.so.1.0.0
/usr/lib/libqxcppunitd.so.1.0.0