/usr/lib/x86_64-linux-gnu/libqca.so is in libqca2-dev 2.0.3-6.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libqca.so.2.0.3
/usr/lib/x86_64-linux-gnu/libqca.so.2.0.3