Note that people do not often visit these deceptive websites intentionally - typically, they are opened PUAs already installed on browsers and/or operating systems.
In any case, such rogue websites never download the official Adobe Flash Player installer. Typically, these fake installers install browser hijackers or adware, however, they might also infiltrate Trojans, ransomware or other malicious software. This untrusted website tricks visitors into downloading and using a fake Adobe Flash Player installer, which installs a potentially unwanted application (PUA). What is 'Your Flash Player Is Out Of Date'?