/usr/share/igtf-policy/classic/BG-ACAD-CA.crl_url is in igtf-policy-classic 1.79-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1
http://www.ca.acad.bg/crl/bg_acad_ca-crl.pem