Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb98631b2f38ab6d…

MALICIOUS

PDF

51.9 KB Created: 2020-08-23 20:26:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5b7b8f08d0671548f97259d157445142 SHA-1: a0ee537b65278caedd157442bc0ead049ef5007d SHA-256: cb98631b2f38ab6d7d1ce910f5dc7841cbfb4839c567787f53eecde2130fc612
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, a technique often used to lure users to malicious sites. One critical heuristic identified a redirector link to 'ttraff.com', which is known malicious infrastructure. Another heuristic flagged the document as a link farm, with many external PDF links, predominantly hosted on 'cdn.shopify.com'. The document body contains obfuscated text and the primary malicious URL, suggesting a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=2020+audi+r8+v10+performance+review In PDF document text
    • http://files.airporthoppermaynooth.com/uploads/1/3/1/8/131857465/retakozalogunewu.pdfIn PDF document text
    • http://degafoxo.jodyrathgeb.com/uploads/1/3/1/4/131407089/3bb4da3163a8.pdfIn PDF document text
    • http://bafami.salsa2013viiisesquiannualconference.com/uploads/1/3/0/7/130775971/pilixeret.pdfIn PDF document text
    • http://files.agingsuccessfullytoday.com/uploads/1/3/0/8/130873902/vidawavu.pdfIn PDF document text
    • http://fegutit.vickeldarby.com/uploads/1/3/1/4/131438640/7abd62798063c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7727/1716/files/nusibolim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9934/8389/files/23110111278.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sakemiribukewud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/55267536834.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/darivuluvol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/kinavulipemekagusir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0637/7632/files/forces_and_motion_basics_phet_lab_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2153/9240/files/aps_cracking_the_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6671/0433/files/majeleroretikufojusip.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C36 5668 bytes
SHA-256: 1e9b48f9ae70a8f944e468e0318ec530ba4c148f294ea49fd9f7c27572842f0b
font_01_sfnt_off00009f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F7A 10316 bytes
SHA-256: 1f34f1c86233fccc42f3a88d1a89dc50355a4b83593c61bf6299514bea8a3f5a

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