/usr/lib/libvtkWidgetsPythonD.so is in python-vtk 5.10.1+dfsg-2.1build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libvtkWidgetsPythonD.so.5.10
/usr/lib/libvtkWidgetsPythonD.so.5.10