Malicious PDF — malware analysis report

Static analysis result for SHA-256 131b8219751822ba…

MALICIOUS

PDF

50.1 KB Created: 2020-07-26 20:08:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3b0ee25606bcb3c19c4ffc4a74d48022 SHA-1: 64a465539411207f72f72f399451124145560dc9 SHA-256: 131b8219751822bac7932d637a1d5b42801dc99b2cf4b49fd406f3e53b2ffdbe
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating it links to malicious redirector infrastructure, specifically `ttraff.cc`. It also exhibits characteristics of an SEO link farm, suggesting an attempt to distribute malicious content or phish users. The ML classifier strongly supports its malicious nature. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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=sinus+of+valsalva+aneurysm+guidelines In PDF document text
    • http://files.apoiesis.com/uploads/1/3/2/7/132711999/magizusukudiveneb.pdfIn PDF document text
    • http://files.triplecrownbasketball.com/uploads/1/3/1/1/131163578/labotabovig.pdfIn PDF document text
    • http://files.bettingonasecondchance.com/uploads/1/3/1/4/131454143/6b8b33e7421.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/1/0434/0868/7269/files/gemuvonefovafom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/jepogagorakesawire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1013/8017/files/bixuxobogex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7920/5013/files/zonuno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/86881601775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4100/3432/files/38696474929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6838/3641/files/59638580307.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7197/9171/files/muzibidokiwotukiniviwuler.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2785/6536/files/winufa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7829/5450/files/laxafatuzugotavewuten.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6300/0734/files/9533161849.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3932/6365/files/kulijasakidag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0357/4432/files/pujarezananede.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 6

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_off000086e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86E5 5296 bytes
SHA-256: d5efa61aa75b8d1ce3d7531fbee7c724e57755d92bc56fa2bb51852be6aa456f
font_01_sfnt_off000098cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98CD 10108 bytes
SHA-256: 6d223895fa0d140076d670d9ec95462097fb086cf9f42deb4755eb21571ff69b

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