Image tif = Image.getInstance("iText.tif");

        RandomAccessFileOrArray randomAccess = 
             new RandomAccessFileOrArray(
                  file.getAbsolutePath(),
                  false, 
                  Document.plainRandomAccess); 
        int pages = TiffImage.getNumberOfPages(randomAccess);
        for (int i = 1; i <= pages; i++) {
            Image image = TiffImage.getTiffImage(randomAccess, i);
            document.add(image);
        }

    try (ImageInputStream iis = ImageIO.createImageInputStream(file)) {
        ImageReader reader = getTiffImageReader();
        reader.setInput(iis);
        int pages = reader.getNumImages(true);
        for (int imageIndex = 0; imageIndex < pages; imageIndex++) {
            BufferedImage bufferedImage = reader.read(imageIndex);
            Image image = Image.getInstance(bufferedImage, null, false);
            document.add(image);
        }
    }
    private static ImageReader getTiffImageReader() {
        Iterator<ImageReader> imageReaders = ImageIO.getImageReadersByFormatName("TIFF");
        if (!imageReaders.hasNext()) {
            throw new UnsupportedOperationException("No TIFF Reader found!");
        }
        return imageReaders.next();
    }

    PdfReader reader = new PdfReader(origin);			
    PdfStamper stamper = new PdfStamper(reader, out);
    reader.getCatalog().remove(PdfName.METADATA);
    HashMap<String, String> info = reader.getInfo();
    info.put("Title", "new title");
    // ....
    stamper.setMoreInfo(info);

    PdfReader reader = new PdfReader(origin);			
    PdfStamper stamper = new PdfStamper(reader, out);
    reader.getCatalog().remove(PdfName.METADATA);
    // This function now return Map
    Map<String, String> info = reader.getInfo();
    info.put("Title", "new title");
    // ....
    // And now we need a cast 
    // (setMoreInfo is deprecated in OpenPdf but the alternative doesn't exists in itext)
    
    stamper.setMoreInfo((HashMap)info);