Malicious PDF — malware analysis report

Static analysis result for SHA-256 1958199bd276d49b…

MALICIOUS

PDF

41.5 KB Created: 2020-08-03 17:49:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4324179274eec78329d3e294269710da SHA-1: 06bdaf6ca41944d883149c113e853bdd44a2425c SHA-256: 1958199bd276d49bca7c980da4714abde1d135d53cdd7047cb05e5fe2cd875dd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same redirector URL and several benign-looking Shopify URLs, suggesting a lure to a malicious site. The ML classifier strongly supports the malicious verdict.

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=reading+comprehension+b1+pdf+british+council In PDF document text
    • http://files.worldwar2under16s.com/uploads/1/3/1/6/131606056/dorijafaveri_kojopepo.pdfIn PDF document text
    • http://files.beworldwise.com/uploads/1/3/0/9/130969041/2a52b162c987.pdfIn PDF document text
    • http://files.belmardemocrats.org/uploads/1/3/0/7/130776228/795741cad6266.pdfIn PDF document text
    • http://files.miazaros.com/uploads/1/3/0/9/130968985/nerok.pdfIn PDF document text
    • http://jozizopit.raverstoriesproject.com/uploads/1/3/0/8/130814575/7353180.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/1/0440/1777/8838/files/gojonizelavoteja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3369/8209/files/kebirinavifaxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/nuxiwofenan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5892/9570/files/barreiras_da_comunicao_organizacional.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/wugoxeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/pekakogudu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7745/9365/files/73102494519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0221/5074/files/zafagedeselawis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/5383752229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1097/2053/files/bavasumejulefasupive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2251/4338/files/java_read_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1112/1063/files/navy_prt_instruction_2016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1297/9869/files/65222460582.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_off0000639c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x639C 5768 bytes
SHA-256: 6f4cd084a26f81711618e2652a815de4119a09f45f489925226e13257dcc547d
font_01_sfnt_off0000771b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x771B 9904 bytes
SHA-256: 8edcbd3d57b980f6b54f563cb660cde4e71857410dde622f75b707feb8cddc77

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