Malicious PDF — malware analysis report

Static analysis result for SHA-256 282fef175fc09857…

MALICIOUS

PDF

92.3 KB Created: 2020-11-25 02:08:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: dfc693da59b3170df121f7a6f016bfee SHA-1: 85293bc66e7584b1fe6e3386e0db90e60a4653ff SHA-256: 282fef175fc09857751c2b091bc76af3e7ebedaec9476048dedf13ed4c062071
214 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to redirector infrastructure or other PDF files, suggesting a link farm or phishing attempt. The primary malicious link identified is https://gettraff.ru/strik?utm_term=chapter+5+consciousness+review+worksheet+answers, which is flagged as a known malicious redirector. The document's structure and content indicate a deliberate effort to drive traffic to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://gettraff.ru/strik?utm_term=chapter+5+consciousness+review+worksheet+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4444850/normal_5f9ddc91e06cb.pdfIn PDF document text
    • https://xizerusepu.weebly.com/uploads/1/3/4/3/134308384/ca387.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372076/normal_5f8aff5470a7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416810/normal_5fa5b987acc05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459162/normal_5fade94ee26ee.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/b4d60.pdfIn PDF document text
    • https://zoxaminajoge.weebly.com/uploads/1/3/1/6/131637873/26725a8e.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/8363686.pdfIn PDF document text
    • https://lilikisewusufod.weebly.com/uploads/1/3/2/6/132682662/domiwibotar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408184/normal_5fab2551b4187.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c39f1b11-9b06-4562-8f6c-e92c888f5071/xuxajotewanadutijezif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f42ccee-19f5-462c-8087-a4fc7cad5658/72617794657.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_off00012c49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C49 5232 bytes
SHA-256: fc1ab5ed2063727b7cfa4f2c6002692ffa953906e708e9cd30b06a02eb86cba7
font_01_sfnt_off00013e27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E27 11032 bytes
SHA-256: 768aaf7b11875c6c4915f1ae41a3551faf313bfbc0f4270cfebf8e5f9bbf5e5d

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