/usr/lib/x86_64-linux-gnu/libvtkRenderingQtPython27D-6.3.so.6.3 is in libvtk6.3-qt 6.3.0+dfsg1-11build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libvtkRenderingQtPython27D-6.3.so.6.3.0