/usr/lib/python2.7/dist-packages/zope/annotation/interfaces.py is in python-zope.annotation 3.5.0-0ubuntu5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/zope/annotation/../../../../../share/pyshared/zope/annotation/interfaces.py