Adobe Acrobat X reached its "End of Life" years ago. It no longer receives security patches. Using it to open PDFs from the internet can expose your computer to malware.
The "Lite" software wasn't just a viewer. It was a key. The repacker who created this specific ISO, the one from the Bulgarian server, must have known. Or perhaps the file on his grandfather’s drive had modified the software in real-time. The ISO wasn't just "portable"; it was mutable.
While "Adobe Acrobat X Pro Lite 10.0.2 Portable.iso" sounds like the perfect utility for your toolkit, it is a relic of the past that brings more security risks than benefits. Between the lack of security updates and the high probability of embedded malware, you are much better off using a modern, lightweight PDF editor.
Version 10 was known for its reliable Optical Character Recognition (OCR) for converting scanned documents into searchable text.