The attached PDF file is shown as blank in the viewer and throws an exception:

java.lang.ClassCastException: org.icepdf.core.pobjects.Reference cannot be cast to java.util.HashMap
  at org.icepdf.core.pobjects.graphics.PColorSpace.getColorSpace(PColorSpace.java:97)
  at org.icepdf.core.pobjects.Resources.getColorSpace(Resources.java:92)
  at org.icepdf.core.util.content.AbstractContentParser.consume_cs(AbstractContentParser.java:241)
  at org.icepdf.core.util.content.OContentParser.parseText(OContentParser.java:921)
  at org.icepdf.core.util.content.OContentParser.parse(OContentParser.java:179)
  at org.icepdf.core.pobjects.Page.init(Page.java:368)
at org.icepdf.ri.common.views.PageViewComponentImpl$PageInitializer.run(PageViewComponentImpl.java:1039)
  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
  at java.lang.Thread.run(Thread.java:722)