JPEG file
Read this JPEG is broken.
It will be fixed if you change somewhere by 1 bit.
tktk-892009a0993d079214efa167cda2e7afc85e6b9cb38588cba9dab23eb6eb3d46

I started analyzing the file with the common tools.

As we can see, there is nothing interesting. So, I decided to check the JPEG header manually.

Still couldn’t find anything. I decided to try to open the image with GIMP.

Look at the warnings! It means there is a marker where it shouldn’t and also the marker’s type is invalid which is 0xFC. Since the markers start with 0xFF, we just need to locate FF FC in the binary and change a bit in 0xFF to remove that invalid marker.

Let’s search for the marker’s offset.

Now, just replace 0xFF to something else like 0x7F with your favourite hex editor.