Malicious PDF — malware analysis report

Static analysis result for SHA-256 5066aec3d08f202b…

MALICIOUS

PDF

79.5 KB Created: 2020-12-27 08:30:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9e59b2278e4b0248262ecce21a28003d SHA-1: 8ceb32459528f0b464ff2cfff44d09e82905f913 SHA-256: 5066aec3d08f202b61518fd50bc6b80b36e074c0aaaed1195320345771fcbda1
154 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagging it as a PDF redirector link. The embedded URL, 'https://gettraff.ru/aws?utm_term=medical+certificate+form+211+revised+1998', is a known malicious redirector. Although no scripts were explicitly extracted, the PDF structure and the nature of the URL suggest an attempt to deliver a malicious payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gettraff.ru/aws?utm_term=medical+certificate+form+211+revised+1998 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4472185/normal_5fc6007317d4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459188/normal_5fa9ce63f0ba1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465136/normal_5fae08abea07f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f9f79907f3dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368991/normal_5fa46ba1894ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383452/normal_5fa065c7ed705.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_5fc132065ea00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417648/normal_5f97abccc41e7.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/f05bce95-51fc-4832-9cb7-116aa2e07165/laxesonokusu.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/whatsapp_free_for_desktop.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/trigeminal_neuralgia_mri_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e337a08a-1bdb-4f6e-8f0a-7050e84cb568/94581471776.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/rolatuz.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/bitek.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/dolekikovibu.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/bluetooth_devices_windows_7_free.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_off0000f8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FF 5764 bytes
SHA-256: 5dcb3a9824645a5502d0f0b13dc4702ec88bbffb96f3f0309ef5a88114e83dc2
font_01_sfnt_off00010c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C98 10720 bytes
SHA-256: 4ee200d2b514750a9e93dde50f84945eecfff6bbc616b8e432acb1ba455dcb5d

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