Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f4e8c2cfabd4621…

MALICIOUS

PDF

66.9 KB Created: 2020-11-09 19:46:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 6f002400577c9eb81a41519179d847f7 SHA-1: fe9b333175b9e4043a4f55bc29d2a75c858ec183 SHA-256: 6f4e8c2cfabd462137ce28b9a489b2c31784f1696d7cf463760a0644a63d741e
274 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirection and a link farm, specifically pointing to 'traffmen.ru' as a malicious redirector. The document body, though heavily obfuscated, contains keywords related to 'Minecraft' and 'qr codes', suggesting a lure. The presence of numerous PDF links, including one to 's3.amazonaws.com/fokapikow/kugida.pdf', indicates a potential distribution network for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://traffmen.ru/123?keyword=minecraft+steve+mii+qr+codes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4394061/normal_5fa0871eb53d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_5f9e6df1b46e3.pdfIn PDF document text
    • https://kifobanirijo.weebly.com/uploads/1/3/4/5/134595275/radukomokan_takok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444882/normal_5fa08ad9d5a61.pdfIn PDF document text
    • https://leruzifu.weebly.com/uploads/1/3/2/3/132302941/pisimadepex.pdfIn PDF document text
    • https://rizowexerezo.weebly.com/uploads/1/3/4/2/134265486/fodanojodo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378149/normal_5fa8faf5330d9.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/1d44b872.pdfIn PDF document text
    • https://gumomamomav.weebly.com/uploads/1/3/1/3/131398069/6005561.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fokapikow/kugida.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/81826361066.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b07514f9-a5b5-447b-bcb5-0f93c8b3173b/59955218118.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/personality_test_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/75506654785.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC860 5324 bytes
SHA-256: 98893e069429b8507f29cc4b6ecb50cdf0167d720868d791313046db4b638e3e
font_01_sfnt_off0000da79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA79 10552 bytes
SHA-256: 4611259690994f238331ff2ac899afd7b2593740e3a3c3587832c000661c6c09

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