Malicious PDF — malware analysis report

Static analysis result for SHA-256 a847abb12bdc1fbb…

MALICIOUS

PDF

70.4 KB Created: 2020-12-17 19:54:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8225ef3111759c9de152403b046ff40a SHA-1: 1f32d2ccf5d2c6daa70ddf2b514600e04c9953fa SHA-256: a847abb12bdc1fbb3a07f487529fd1a7bc6b97fdf4648c76f5908eea5dcce6c6
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 'ggtraff.ru'. This indicates the document is designed to lure users to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL is sufficient evidence for this assessment.

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://ggtraff.ru/123?utm_term=nba+2k15+v1.02+android+download+%2528+apk+%252B+obb+%2529 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4460060/normal_5fd60d4753c04.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460678/normal_5fc96ba4eeedf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462368/normal_5fb2577379b87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418370/normal_5fa1b91192932.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487894/normal_5fbcc79fd99de.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/taturi/waterfall_chart_excel_2013.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/the_knowledge_illusion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fafc1c37-3bba-499b-866c-b7272718fa0b/mewusixatunikuvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d19b92e-cc91-40c2-9ab8-6876ae8a9740/46293235054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c7f75c9-f97a-4639-8036-bb92b4390849/buvole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcda55ca-744f-4777-93b1-e52de3630477/61702038148.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/tugoxexodeli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca0fa192-c396-4b4f-908a-1d311ac40640/3476983426.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/59072504068.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/9837221010.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_off0000d274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD274 5736 bytes
SHA-256: d8c16376c21ddeb8be8c14da5d00458b57adc70a875b580b0fbe8d804c69c0e7
font_01_sfnt_off0000e640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE640 11104 bytes
SHA-256: 8f1bb336962a93f75e2a15047a9bb73a26b2e09d118c63b845550a411637380b

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