/usr/lib/x86_64-linux-gnu/libvtkRenderingQt-7.1.so is in libvtk7-qt-dev 7.1.1+dfsg1-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libvtkRenderingQt-7.1.so.7.1
/usr/lib/x86_64-linux-gnu/libvtkRenderingQt-7.1.so.7.1