iPadOS 8.4.1 (build 12H321) is an official Apple over-the-air update for the iPad 2 (GSM), released on 2015-08-13T18:05:06Z. The update package is 388.15 MB. This is a delta (partial) update that requires 8.1 already installed. This update is currently signed by Apple, so it can be applied from Settings › General › Software Update.

Payload file: d3325d5a26db8045dc4556332fb7d7d66af5fb60.zip.