/usr/lib/libMagick++.so.4 is in libmagick++4 8:6.6.9.7-5ubuntu3.9.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libMagick++.so.4.0.1
/usr/lib/libMagick++.so.4.0.1