"Portable" executables are the perfect camouflage for viruses. Since the software is already modified, your antivirus might struggle to tell the difference between a "crack" and a malicious script designed to steal your passwords.
A "portable" app is a version of software modified to run without a formal installation process. In theory, you could keep it on a USB drive and use it on any computer. adobe illustrator portable cs3 mediafire
However, Adobe a portable version of Illustrator CS3. These files are created by third parties who strip down the original software, bypass activation (cracking it), and repackage it. The Dangers of MediaFire Downloads bypass activation (cracking it)