Okay, I opened the Yuri file in the Notepad application (it could be called notebook actually...) and it came with a random scramble of letters. It doesn’t look like programming or coding, it looks very deliberate, and there is two equal signs at the end of it. So I’m sure it’s Base 64 coding. Once I decoded it, it resulted in a short creepypasta, here is this link:
https://www.reddit.com/r/nosleep/comments/3azru6/i_found_a_small_box_hidden_in_a_mall_that/
Does anyone know the significance of this story? Or is it just random?