if you need to use the filter object for the <resource>.search function - you can use the below helper function to build your filter nodes easily:
function concatFilters(f1, f2, and) {return {"Operation":(and ?"AND":"OR"),"LeftNode":f1,"RightNode":f2 };}
now call the function and build your filter object:
var uuids =// your attachments in an arrayvar filter = { "Operation":"IsEqual","ApiName":"UUID", Values:[uuids[0]] };for (var i =1; i <uuids.length; i++) { filter =concatFilters(filter, { "Operation":"IsEqual","ApiName":"UUID", Values:[uuids[i]] });}