/usr/lib/x86_64-linux-gnu/libTKXCAF.so is in liboce-ocaf-dev 0.15-5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libTKXCAF.so.8
/usr/lib/x86_64-linux-gnu/libTKXCAF.so.8