Malicious PDF — malware analysis report

Static analysis result for SHA-256 3907bb7cd6ad594f…

MALICIOUS

PDF

45.9 KB Created: 2020-08-09 16:29:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b0b21614e110621dd7055e286c33e72a SHA-1: ed4203a8b1c9c66fa7fa2b55d194b1be70f4acad SHA-256: 3907bb7cd6ad594f48fe790f3520184d44efbfcf829e994ed30d788e0b39eadd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a printable alphabet guide. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and the embedded URL point to ttraff.ru, which is known for malicious redirection. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, further supporting a malicious distribution or phishing intent. The ML classifier also strongly flagged this PDF as malicious.

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=abecedario+en+cursiva+mayuscula+y+minuscula+para+imprimir+pdf In PDF document text
    • http://files.crisscrossroadbeeyard.com/uploads/1/3/1/8/131856352/zulojenipabegur.pdfIn PDF document text
    • http://files.crystalimagesphotography.org/uploads/1/3/2/6/132696029/fafufalatulife_pisiluwol.pdfIn PDF document text
    • http://files.buyers-club-solar.com/uploads/1/3/1/3/131398131/9206617.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/1/0436/3301/6982/files/burger_king_gutscheine_august_september_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/lugamimuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0165/9043/files/english_arabic_mathematics_dictionary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/8013276812.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0079/1191/files/rekomudikogo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0763/1782/files/30468758457.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0844/8920/files/31322823955.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3689/1544/files/37441054663.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3635/9326/files/23069828037.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1615/9385/files/95798528172.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9002/7430/files/sogefiwujufidezisiwonaduj.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_off00006fe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE4 5592 bytes
SHA-256: 569f19884309a7c297f8788647b2b0644655e1a636cd739e96cac0d5b9f10a50
font_01_sfnt_off000082de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82DE 11504 bytes
SHA-256: e9fd3da0e6bcea8626ad401af9b194a0fb3c39aabc1cdf8a593ffe00aeef98c0

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