Only images? Or like the whole forum but totally offline?
I'm a little confused (probably because of my language barrier

) as well as curious! What do you intent to do with a backup of "links of images"? If it's only links for images, then afaik talkimg has a public backup of that, available to download at any given time.
I have personally used HTTrack before. It would download/clone/copy (whatever you call it) every page, every image, links, section by section, folder by folder and make a backup of it categorized. A very powerful tool that is, but the problem is it's very time consuming and resource hungry. So without a proper setup it might take days or weeks based on the site you are tying to copy. I had tried it with altcointalk once, and even after hours there weren't any significant progress (maybe because of my internet is the shittiest).
After reading a couple more times, I think I confused with actual images and links of images.