I'm new to Cicada 3301, but I'll try my best to uncover oddities
There are some strange things about page 4 in ut3qtzbrvs7dtvzp.onion (the page with the cicada looking left and the ladies left / right).
1. The file is compressed with 100% in JPEG. This leads me to the assumption that there is information which would be destroyed if you compress it with 75% percent as the other images have been. Converted it to PNG and run ZSTEG on it - result was an 8MB file with binary content. 2. In the upper section above the ornaments are some hidden "stars" (attachment). The ladies look mirrored, but when you mirror it you'll see differences. It's not an exact mirror - you can see retouching.
I know, this page was solved already, but my guess is, that there is more.
Wrong path with the ZSTEG binary, just binary representation of the image itself.