What Is Us09.biz?
Us09.biz is a shady website which tries to trick people into subscribing to push notifications from the site. Us09.biz may tell users that they have to click or tap Allow on its notifications confirmation pop-up box if they want to watch a video, download a file, access a page, verify that they are not robots, etc. If a user clicks Allow, notifications from Us09.biz will start popping up from time to time in a corner of the screen with ads, links to dubious sites, prompts to download something, fake messages, etc.