/usr/lib/x86_64-linux-gnu/libsmime3.so.1d is in libnss3-1d 3.13.1.with.ckbi.1.88-1ubuntu6.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libsmime3.so
/usr/lib/x86_64-linux-gnu/libsmime3.so