/usr/lib/x86_64-linux-gnu/libdbustest.so.1 is in libdbustest1 15.04.0+16.10.20160906-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libdbustest.so.1.0.0
/usr/lib/x86_64-linux-gnu/libdbustest.so.1.0.0