iPadOS 8.4.1 (build 12H321) is an official Apple over-the-air update for the iPad 2 (Mid 2012), released on 2015-08-13T18:05:06Z. The update package is 793.37 MB. This is a delta (partial) update that requires 7.1.2 already installed. This update is currently signed by Apple, so it can be applied from Settings › General › Software Update.

Payload file: 699a4c1b25154115cd5691960fcb9107cbcc06c7.zip.