iPadOS 8.4.1 (build 12H321) is an official Apple over-the-air update for the iPad 2 (CDMA), released on 2015-08-13T18:05:06Z. The update package is 1001.42 MB. This is a delta (partial) update that requires 6.0 already installed. This update is currently signed by Apple, so it can be applied from Settings › General › Software Update.

Payload file: c121690f77afbd762b0c993ada682c4ce2e20704.zip.