I uploaded a corrupted PDF into an LLM to understand how it analyzes it. First, I modified the font using non-contextual alternates and then tested the file across several different models. As expected, the results are twofold: This raises critical concerns and a series of questions. Is it possible to perform data injection through this…

It is possible use the OpenType Feature to hidden messages in the text? By manipulating a typeface through font editors such as Fontra, it is possible to leverage OpenType Features to trigger specific character substitutions where a predefined sequence of letters is replaced by a single, custom glyph. While typographers traditionally use this functionality for…