Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9d36e2f485decdf…

MALICIOUS

PDF

201.9 KB Created: 2020-11-24 14:44:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: efecc5b8a6cbd5ea1ac53d921fb8f79a SHA-1: bcf3739fb71a0081e0112fbdd9b7602652839873 SHA-256: b9d36e2f485decdffac1e6b50fec104d35bf800ce7788fedd2c58183dfb1fc14
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 'traffking.ru'. Additionally, a ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the redirector suggest an attempt to lure the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://traffking.ru/strik?utm_term=physiology+breastfeeding+challenges In PDF document text
    • https://sokegipamemaxo.weebly.com/uploads/1/3/4/3/134345901/judavo.pdfIn PDF document text
    • https://bojojibapofaz.weebly.com/uploads/1/3/4/4/134478515/07fb082.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/6564c0a1-c6f2-4668-80fc-572724e8bd69/einstein_s_big_idea_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/22410082550.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67a2b63a-3b7e-42b0-be83-fb1a4a462873/64820625255.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8641586-fad7-413b-9665-386507c8de8d/19112062747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba05c2fd-aa5f-43c9-9aea-36e058d20baf/58404260550.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65436f4a-1278-4bf7-a3a1-6f30bcd81ff6/the_china_study_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e20237d8-17e4-4c42-b3a8-f6250c2bc01a/bevufe.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/ielts_writing_task_2_samples_academic_band_8.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/atualidades_para_enem_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/tutu_app_apk_download_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14cb366f-1741-42dc-be59-ec9cdb5ca5a2/negenemidowe.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_off0002dcd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DCD0 5524 bytes
SHA-256: ecb8bbb3ae29f479eb14bc00fcffa96f3c48a5d5ba6de727429f0024e7ff17d6
font_01_sfnt_off0002ef9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF9A 12004 bytes
SHA-256: d3a6f898fc8478ab0b49c10161dce26aead1dce6825966876c2a053f415dd317

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