Malicious PDF — malware analysis report

Static analysis result for SHA-256 8262dce118100cf5…

MALICIOUS

PDF

44.5 KB Created: 2020-08-16 12:18:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b6b1f3873bc969fc23b307a0fc4d800e SHA-1: 99abaa5b9cc555d05d6a19a2ca0802b107defb2c SHA-256: 8262dce118100cf50139df3f75c2c8c468a70bd949e0cd58f54eb7d08605d1bf
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains the same redirector URL, suggesting an attempt to trick users into downloading further content. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=catherine+full+body+ps+vita In PDF document text
    • http://files.creativconcepts.studio/uploads/1/3/0/9/130969896/c3825eb23c178f.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/1/0431/3926/8770/files/8587402405.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2393/2311/files/faveg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0414/8382/files/wusumuzovig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4817/3722/files/entrepreneurship_lecture_notes_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1793/4747/files/zelda_2_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6866/1670/files/tipos_de_anomalias_cromosomicas_estructurales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7849/2072/files/62914316364.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1077/6478/files/botw_title_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1008/8342/files/tetoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5627/5362/files/mathematics_formulas_in_telugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6127/2995/files/talepusaragis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89462818099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6019/1637/files/self_appraisal_form_answers.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 7

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_off00006dd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD3 5336 bytes
SHA-256: 721ae61f7546228d696c51325584c16ff5b3cd8cf11c41519efddf0b5efe08f3
font_01_sfnt_off00007fef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FEF 11508 bytes
SHA-256: c2975713f3484599652f0e3fda61389aee997ba3b94f8bfda271c944c177f64c

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