Affinity Publisher
From Just Solve the File Format Problem
Affinity Publisher is desktop publishing software released by the UK software company Serif. The Affinity products Designer, Publisher and Photo replaced earlier Serif products like DrawPlus, PagePlus, and PhotoPlus.[1] Originally released in June 2019.[2]
Format Identification
All Affinity software uses a proprietary file format.[3]
They all appear to contain hex values "00FF4B41" for the first 4 bytes.
