Malicious PDF — malware analysis report

Static analysis result for SHA-256 607cc796ddee1470…

MALICIOUS

PDF

49.6 KB Created: 2020-08-01 19:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5040f6d12690e64025da9651b3a7bb20 SHA-1: 1d9fa0fe7839ea537e2577d1e941ba2f95f49d53 SHA-256: 607cc796ddee147059322e2f5727166f9ba162e45e46ed036ba531b34d7acde5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a redirector, which is a common tactic for distributing malicious content. The redirector then points to a large number of other PDFs hosted on Shopify, suggesting a link farm or SEO poisoning attempt to drive traffic. While no scripts were directly extracted, the PDF structure and embedded URLs indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=5th+edition+monster+manual+pdf+download
    • http://files.detroittaprep.com/uploads/1/3/0/7/130775371/xokiro.pdf
    • http://files.delamare-photography.co.uk/uploads/1/3/2/6/132681536/movuw.pdf
    • http://files.mtzionfire.org/uploads/1/3/0/8/130813132/9299726.pdf
    • http://files.andrewdlinden.com/uploads/1/3/2/8/132815220/fowedusit-dolobitezaju-runukirug.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2702/1480/files/68467073615.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9645/files/70228048909.pdf
    • https://cdn.shopify.com/s/files/1/0429/6520/5141/files/naravewog.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3785448733.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51994241049.pdf
    • https://cdn.shopify.com/s/files/1/0437/5491/3943/files/65718298189.pdf
    • https://cdn.shopify.com/s/files/1/0434/9453/9429/files/facebook_login_logout_button_php.pdf
    • https://cdn.shopify.com/s/files/1/0434/7976/1061/files/53696986103.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/41800861135.pdf
    • https://cdn.shopify.com/s/files/1/0438/3434/3574/files/3958844582.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/zosuwigaxodabubafel.pdf
    • https://cdn.shopify.com/s/files/1/0436/1371/6643/files/xilaxirixalurafixiwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9639/9265/files/besaxirusi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1425/0905/files/42739436702.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000081ec.bin
2f3c6bb7bf146c1bfe18676b63896519f55e222f193244af625a09edd40a62b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81EC 5404 bytes
font_01_sfnt_off00009432.bin
c8043a1ec5056a79f3d910fef5eecc0778d23ba24f9a6f46cc9afad17133b7ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9432 10772 bytes

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