/usr/lib/liborocos-kdl.so.1.3 is in liborocos-kdl1.3 1.3.1+dfsg-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/liborocos-kdl.so.1.3.1
/usr/lib/liborocos-kdl.so.1.3.1