Malicious PDF — malware analysis report

Static analysis result for SHA-256 3df73fa53913ad4d…

MALICIOUS

PDF

49.6 KB Created: 2020-08-09 01:39:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 910f7ba26b0aa3627d9190f1f54c7c74 SHA-1: 04427847c0563ad6a3df7703603e49b06aade6e3 SHA-256: 3df73fa53913ad4d2b7a88e9e2d25a341732494eae536ec31ed58f27d371585a
194 Risk Score

Malware Insights

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

The PDF file contains numerous links, masquerading as a document download for "Ssc stenographer books pdf download". One of these links, https://ttraff.cc/pify?keyword=ssc+stenographer+books+pdf+download, redirects to known malicious infrastructure. The PDF also contains a mass external link farm, suggesting a SEO poisoning or link farm tactic to drive traffic to potentially malicious sites. No scripts were extracted, and the document body is heavily obfuscated, but the primary intent appears to be redirecting users to malicious URLs.

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.cc/pify?keyword=ssc+stenographer+books+pdf+download In PDF document text
    • http://files.monsterboylives.com/uploads/1/3/1/4/131406885/xenipif-wafoxobes-reponubuzesij-movezopufiba.pdfIn PDF document text
    • http://kopipib.iconiacapital.com/uploads/1/3/1/4/131407089/xegozon-sevidozuze-nexidanofuxi-rekote.pdfIn PDF document text
    • http://zawamipug.jenniferpolo.com/uploads/1/3/0/8/130814328/9a9ba715ec44.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/1/0428/5333/5207/files/zetarateruxama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9897/2066/files/mamidivufetexixerup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6331/1512/files/93211310728.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8140/8420/files/54536294646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8508/6374/files/zebiwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9526/8264/files/71806007942.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/romosarupebutobolaganenuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5013/8784/files/twitter_api_keys.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/ornate_rusted_key_gw2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/18475987626.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2499/6773/files/31875042133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/45583648064.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_off00007503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7503 5816 bytes
SHA-256: 6b351ae924cc8560d6794637f8d8c723d6f1f1cb2b9c104cd3339a22b68c40b2
font_01_sfnt_off000088d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88D9 15076 bytes
SHA-256: 42f3356a40b855f281b84a1a7ea88b27385a94a2872e52c546271dfba7e2ebea

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