Malicious PDF — malware analysis report

Static analysis result for SHA-256 1af60ee87b3eeb14…

MALICIOUS

PDF

61.7 KB Created: 2020-12-18 19:21:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 17e87fb74daaff2f94dd9924189a5257 SHA-1: 2d875f2c52b468609f1cf5e098ab822c28b08788 SHA-256: 1af60ee87b3eeb14e5d77161d28e871872b7eaf81df07e090fcce7cd9ebbd7a8
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://traffking.ru/aws?utm_term=skills+link+everyday+mathematics+grade+5+answers'. This indicates the document's primary purpose is to lure the user to this external site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • 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://traffking.ru/aws?utm_term=skills+link+everyday+mathematics+grade+5+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4428054/normal_5f9b0f89d5d7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389108/normal_5faadee19fb6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416927/normal_5fadc82fabedb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405197/normal_5fa5f727e2b5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408995/normal_5fc3c2ae70ca1.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/tosevud/cheat_engine_for_pc_windows_10.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a5de085bf90c0e1d7acc/t/5fcded872bc7884852d8b7ce/1607331208132/tozokutato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db9f9f5b-fa63-4b1b-894e-1dc1c192ec7f/gikojuzugadanadafom.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/xojulixuxu.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/codility_test_questions_and_answers_python.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/how_to_meditate_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/siwegefawuver.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_off0000b2c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2C7 5900 bytes
SHA-256: e9cb46260a7d4c9db92c4abdd8ba65de4b916e6d86ea0fdc941a9a2adbfc8389
font_01_sfnt_off0000c6d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D0 10304 bytes
SHA-256: 0aaab56ca50d1efa0f2f585d1bf6d1b7e1f301d4155d5f569529835286d98022

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