Safari downloading a strange file
Well, some days ago I was browsing the internet and Safari downloaded a file called 2018-2019.zip, and it resulted to be an alias to who knows where. As it was taking so much time to see the original folder I just deleted it and that. But today it happened again, I deleted it again and then while visiting Google images I selected an image and between the time that the image started to expand the cursor turned into the circle of colors and it dowloaded the 2018-2019.zip. I opened it, and this time didn't that that much time to show me the original folder (seems like its a server) and it was called 2018-2019 (it's in the image). I opened it and there was an APP with the icon of a folder called PDF (at first I thought that it was a folder but it opened like an app) and it didn't really opened anything. So I searched in the about this (I don't know how it's in English, is that thing to see more info about the folder/app) and indeed it was an app with the icon of a folder called PDF.app. I searched then the contents of the app, and there was an PDF folder (this time for real) and it had a document that I have in my desktop. I scanned this document with my phoneDoes anyone knows what is this about?
MacBook Pro 13", macOS 10.14