Because the blog linked to file-hosting sites, there was no guarantee of integrity. While the blog owner may have uploaded a clean file, file-hosting services were often susceptible to takedowns. If a file was taken down, a malicious actor could potentially re-upload a "fake" version (malware disguised as Photoshop) and redirect links. Users downloading from the blog were trusting an anonymous intermediary not to infect their machines.
Before downloading, ensure your system meets the minimum requirements: portableappz.blogspot photoshop cs6
If you are using a portable version, it is usually based on the Creative Suite 6 (v13) Because the blog linked to file-hosting sites, there