Help! Help decrypt this file with the .unity3d extension.

Hello, first I want to briefly talk about this topic:
- If I'm on the wrong side of the thread, please let me know!
- Either irrelevant or off topic.

At issue, I'm trying to decrypt a file with the .unity3d extension from a game. I'm looking to get some of its resources.
But the problem arises when I use software like AssetStudio, AssetRipper, etc. When I open the files, nothing appears. Looks like it was encrypted.

So I want to ask and need help on how to decode it. Thank you!
If possible, I would like to have specific instructions

The game's name is: ライドケミートレカ　ガッチャードファイル
Google Play: ライドケミートレカ　ガッチャードファイル - Ứng dụng trên Google Play
Its APK: Android向けのライドケミートレカ　ガッチャードファイル APKをダウンロードしましょう (apkpure.com)

Here is the sample asset file:
> Its asset files: GotchaFiles.rar <