iPadOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPad Pro (10.5-inch, WiFi), released on 2018-05-29T17:15:30Z. The update package is 610.13 MB. This is a delta (partial) update that requires 11.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 71cecf5776b2c70e971275d2c4d3a9dfcc1f64fa.zip.