index.html

<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Tenishchev Semen CV</title>
    <style>
        html {
            height: 100%
        }
        body {
            height: 100%;
            width: 100%;
            margin: 0;
            display: table;
        }
        .header_bar {
            display: table-row;
        }
        .iframe_container {
            height: 100%;
            display: table-cell;
        }
        iframe {
            height: 100%;
            width: 100%;
            display: block;
        }
    </style>
</head>
<body>

<object data="https://tenischev.github.io/cv/cv.pdf" type="application/pdf" height="100%" width="100%">
    <iframe src="https://docs.google.com/viewer?url=https://tenischev.github.io/cv/cv.pdf&amp;embedded=true"
            height="100%" width="100%"></iframe>
</object>

</body>
</html>