You cannot get infected easily, without you manualy helping it, by clicking on wrong stuff. As long as you click Skip Ad, you are safe, by clicking on any download buttons down bellow will only lead you to problems like that.
added 1 minute later
Ok cool Basicaly something is wrong with servers that are hosting the modpack, they sometimes cannot receive my new file, and in that case I must strike out the link to inform the people by this that it's not working properly.