iPadOS 8.4 (build 12H143) is an official Apple over-the-air update for the iPad 2 (Mid 2012), released on 2015-06-30T15:51:07Z. The update package is 793.25 MB. This is a delta (partial) update that requires 7.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 63620bcbdb166983a4c43728c136b99a9b7ce1fb.zip.