/usr/lib/x86_64-linux-gnu/libgdcmMSFF.so.2.6 is in libgdcm2.6 2.6.6-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libgdcmMSFF.so.2.6.6
/usr/lib/x86_64-linux-gnu/libgdcmMSFF.so.2.6.6