pdf.js

var fs = require('fs');

var http = require('http');
http.createServer(function (req, res) {
  res.writeHead(200, {'Content-Type': 'application/pdf'});
  fs.readFile('pdf.pdf', function (err, data) {
    if (err) {
      res.end('oh shit');
      return;
    }
    res.end(data);
  });
}).listen(1337, "127.0.0.1");