/usr/lib/x86_64-linux-gnu/libfreerdp-shadow-subsystem2.so.2 is in libfreerdp-shadow-subsystem2-2 2.0.0~git20170725.1.1648deb+dfsg1-7.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libfreerdp-shadow-subsystem2.so.2.0.0