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spam-seo.hidden_content.70

Description:
A block of links and a script that makes them invisible.

Here's how it usually looks like

<div id="liangfeng">
...links here...
<scri​pt>
eval​(function(p,a,​c,k,e,d){e=​function(c){return(c<a?"":e(parseInt(c/a)))+((c=c%a)>35?String.fromCharCode(c​+29):c.toString(36))};...skipped...split('|'),0,{}))
</​script>
</div>

The script decodes to this

document.getElementById("liangfeng").​style["display"] = "none";

which makes the links invisible.

Affecting: Any web site (no specific target).