Malicious PDF — malware analysis report

Static analysis result for SHA-256 c681fe2c03fe9f03…

MALICIOUS

PDF

68.2 KB Created: 2020-08-20 11:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ceb3ec0d43c27648481d393fbb82c417 SHA-1: 31d584b04a0f8a837e60dadf674c6413947048ab SHA-256: c681fe2c03fe9f03ccca0d3b6cd25c2786b33379d72cb7220f69fc8de38286cf
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links, many of which point to a redirector service that is known to host malicious content. The primary redirector URL is https://ttraff.ru/pify?keyword=bernette+65+sewing+machine+manual, which is presented as a sewing machine manual. The document body also contains this URL and other Shopify links, suggesting a link farm or SEO poisoning tactic to lure victims. The ML classifier 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=bernette+65+sewing+machine+manual In PDF document text
    • http://files.classicalballetofmd.org/uploads/1/3/1/0/131070983/nekaz.pdfIn PDF document text
    • http://files.corneliusmullerproductions.com/uploads/1/3/1/1/131164231/fazoga.pdfIn PDF document text
    • http://files.cogopsa.org/uploads/1/3/0/8/130813528/zokesaxajewakofetebo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5114/7679/files/65368689442.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/4656/2966/files/weigle_2020_assessing_writing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8307/0630/files/xamorova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9163/9974/files/dallas_fort_worth_airport_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9029/7507/files/66815918181.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3545/7696/files/mother_3_translation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0341/2633/files/clinical_examination_talley.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/44115616021.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a84b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA84B 5404 bytes
SHA-256: 28040654355a503bc5fed249472ae68f76acae8e473d5caec0f52cf7ea5dc745
font_01_sfnt_off0000ba86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA86 2108 bytes
SHA-256: 9566c561863198e01970a0f87e27e9f9deda09d4d6b34b18e17a2b7ac81a4ea0
font_02_sfnt_off0000c3af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3AF 16472 bytes
SHA-256: fd0f3f38b489eef563898a4a5ae4183b31e08cefe7b428e778f7143742120944
font_03_sfnt_off0000f5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EA 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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