/lib/x86_64-linux-gnu/libnss_ldap.so.2 is in libnss-ldap 264-2.2ubuntu4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /lib/x86_64-linux-gnu/libnss_ldap-2.15.so
/lib/x86_64-linux-gnu/libnss_ldap-2.15.so