Edit in JSFiddle

// pdf.worker.js へのパスを指定する 
PDFJS.workerSrc = 'http://seikichi.github.io/tmp/PDFJS.0.8.715/pdf.min.worker.js';

$(function () {
    // 注: pdfData の型は Uint8Array
    var pdfData = loadPDFData();

    // PDFJS.getDocument でPDFドキュメントを読み込み
    PDFJS.getDocument(pdfData).then(function (pdf) {
        // 1ページ目を取得する
        return pdf.getPage(1);
    }).then(function (page) {
        // Canvas に1ページ目の内容を描画
        var scale = 1;
        var viewport = page.getViewport(scale);
        var canvas = document.createElement('canvas');
        var context = canvas.getContext('2d');
        canvas.height = viewport.height;
        canvas.width = viewport.width;
        var renderContext = {
            canvasContext: context,
            viewport: viewport
        };
        page.render(renderContext);
        // body に挿入
        document.body.appendChild(canvas);
    });
});

function loadPDFData() {
    var base64pdfData = '\
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';

    function base64ToUint8Array(base64) {
        var raw = atob(base64);
        var uint8Array = new Uint8Array(new ArrayBuffer(raw.length));
        for (var i = 0, len = raw.length; i < len; ++i) {
            uint8Array[i] = raw.charCodeAt(i);
        }
        return uint8Array;
    }
    return base64ToUint8Array(base64pdfData);
}

              

              

External resources loaded into this fiddle: