Cracked files are a prime vector for distributing malware. A "working key" could easily be a Trojan horse designed to infect your macOS system, leading to: Locking your files until a ransom is paid.
FontLab 7.2.0.7644 Mac Crack: Why You Should Avoid "Free Downloads" Cracked files are a prime vector for distributing malware
You may have come across search results for "." Cracked files are a prime vector for distributing malware