What does a backlink look like?
In order to attract the same quality links as those who have created the most popular link-worthy posts, you must create something similar. Although I don't say you have to copy the post, I also do not recommend that you reinvent the wheel. You can do something very similar to it, but you should make it yours. You can create a widget for it if it is a useful widget. Make a whacky checklist if it's not a useful widget. Your target market should find the content valuable and engaging.
You must create something of the same value to attract links. It's not necessary to duplicate the work of others, nor should you try to do it in a completely new way. You can certainly do something similar to this, but make it yours. If you want to create a widget, it can be a handy widget. If it's an odd list, make a weird list. It doesn't matter what your target market is looking for, the content you create should be useful and informative.
Broken link reporting is a wonderful idea. You are doing the website and webmaster a huge favor by reporting broken hyperlinks. Find relevant websites in your niche. Next, search for your niche to check for broken links.
Do some email outreach to people that have shared infographics with you on social media, or who have linked to similar infographics. However, you should not ask for a URL directly. If they love your infographic, then they'll know what they should do.