Adobe released critical security patches for 2018.009.20050 (moving it to 20055, etc.) to fix vulnerabilities like CVE-2020-9615 (Remote Code Execution). A pre-cracked version freezes the software at a specific patch level. If you open a malicious PDF from a spam email while using this old version, the hacker can take over your PC instantly.
Security firms like Kaspersky and Malwarebytes have reported that 70% of "pre-cracked" software contains more than just a crack. They often include: