Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbdf786d8cc752c1…

MALICIOUS

PDF

68.1 KB Created: 2021-01-06 00:15:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d2e93edf31798aa4226e9b2215176f6b SHA-1: 9f3c6d7c0f521e261e80a7a54607a02db129befc SHA-256: bbdf786d8cc752c1ee51d723def89ccf13ef36d7b2508e50a70dbb69273b52ca
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/wb?keyword=ecology%20auto%20parts%20cerritos%20ca%2090703'. This indicates the document's primary purpose is to lure users to a malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/wb?keyword=ecology%20auto%20parts%20cerritos%20ca%2090703 In PDF document text
    • https://cdn.sqhk.co/zeboxuze/iiidjdK/roxopirudobopaxugubatubu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488582/normal_5fe3dc7480e77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448536/normal_5fda321b7902e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401540/normal_5f9d10bd2b726.pdfIn PDF document text
    • https://cdn.sqhk.co/masunidupag/Ug51pRV/93946207264.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369332/normal_5fcbef540723a.pdfIn PDF document text
    • https://cdn.sqhk.co/keliziniw/fihgjjO/splashlearn_math_5th_grade.pdfIn PDF document text
    • https://cdn.sqhk.co/visukodo/glHiejj/15131114992.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470533/normal_5fccec644ddc3.pdfIn PDF document text
    • https://cdn.sqhk.co/balekunu/athehhd/tractor_pull_marthasville_mo_2020.pdfIn PDF document text
    • http://www.ecoparts.com/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/luborinizu/ziwivupumaguwun.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/bunaxozumuxidut.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/filovamenazoloduluzit.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_off0000cb78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB78 5704 bytes
SHA-256: 1ad20bd41ed2f7b8b1f1cdc92759f1ff03305b99120a664a605e672d1ed72204
font_01_sfnt_off0000df03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF03 10712 bytes
SHA-256: 314b65605cdc48d20d4bc40397ab736f9d21797bb0b3c73476ce3e381a76fe69

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