/usr/lib/libbonobo-activation.so.4 is in libbonobo2-0 2.32.1-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libbonobo-activation.so.4.0.0
/usr/lib/libbonobo-activation.so.4.0.0