iPadOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPad 5 (WiFi), released on 2018-05-29T17:14:34Z. The update package is 1.26 GB. This is a delta (partial) update that requires 10.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 1a9139694972e1e4de2de294b821d6f1dc7873cc.zip.