/usr/lib/x86_64-linux-gnu/libqtcurve-utils.so.2 is in libqtcurve-utils2 1.8.18+git20160320-3d8622c-3+deb9u1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libqtcurve-utils.so.2.0