Malicious PDF — malware analysis report

Static analysis result for SHA-256 70fa3b4aa69731f3…

MALICIOUS

PDF

72.4 KB Created: 2020-11-23 12:13:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d34c856b20e2a7946cca111a983fcbd3 SHA-1: e9508d0672c85de6620e50ed103c517f9751d32e SHA-256: 70fa3b4aa69731f3f167e2825162ff665661de50e64ebe6cc0cfcbe2767cf752
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 'traffine.ru'. This URL is likely used to lure victims to a malicious site. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of a malicious URL in a PDF is a strong indicator of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffine.ru/123?utm_term=2006+ap+calculus+ab+free+response+student+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379485/normal_5f8dad8376d48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389354/normal_5fb3875bb98d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456399/normal_5fa118a72ab40.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/juliziwojatige/vizesirumavi.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/bodyguard_episode_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fe2793e-4cbd-462a-ba98-3966bcd38cc6/fezolozuxasaxeniguw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d95b0cc7-804c-4b3a-903d-c46c7746f270/27985641273.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/bill_nye_blood_and_circulation_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/3228617512.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3911ab3-43f4-4f74-b5a1-00931ee17b06/22046699116.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4DC 5716 bytes
SHA-256: ede19ae194a72023c7b0fdf36cd3bfcf3aa6a79cd51f9bbd060dc936161f3619
font_01_sfnt_off0000d863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD863 11464 bytes
SHA-256: 2723456dd5bbf1a3c49ebb458edd8f4030921764a40346648da6db3154afcf93
font_02_sfnt_off0000ff40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF40 16220 bytes
SHA-256: 8cea1e414dc59ed38dc888dc299abeea106554d144972c155a2f5d5caec212e8

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