Confidence: It's likely to be this, but I can't be certain.
Notes: This doesn't look much like the other picture of Physisporinus sanguinolentus, but that is not a fungus I know. Also, how can you tell how large the pores are, from a picture without a scale. My guess that this is a birch polypore (especially seeing how big the bracket is, and what it looks like from above), but with some bacterial? or fungal? infection in the spore layer. But what do I know?!