Malicious PDF — malware analysis report

Static analysis result for SHA-256 72f83569f1eedb8a…

MALICIOUS

PDF

66.6 KB Created: 2020-11-25 03:49:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c3ee1a86f9d6cf8dafae47391cfb69f7 SHA-1: 67efbde1d8a0fd7ed9ccec089d3d44bbfff3ecf9 SHA-256: 72f83569f1eedb8a0aaa0999644c99092f0751cfc1ee86e1155733eabb959bff
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'. This indicates the document is designed to lure users to a malicious site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of PDF redirects often involves embedded JavaScript to facilitate the redirection.

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://traffking.ru/strik?utm_term=rodriguez+research+group In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413966/normal_5faa46e4228f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f9104b82b0ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421959/normal_5fad5fee2ae27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460449/normal_5fbdb5e5c8b82.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/0eaf8aaf-ab13-49d5-92c7-ae50984001f5/48946084462.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1904ff6d-9f0f-4675-a7b6-a2900a2ac0af/vowimefadimex.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/59561991152.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/ziloxozafapajafeg.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/melbourne_tv_guide_wimbledon.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/temp_root_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/font_carrington_normal_western.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c5702b9-712a-41f1-b1d3-85a8b6a7e9f5/a_frozen_flower_200.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/declare_variable_as_int_python.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_off0000c57f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC57F 5360 bytes
SHA-256: 514e3a97743e7ac2830330a7f431732fdd2dcb4fc9fc2eea3aa04c5a33569541
font_01_sfnt_off0000d7c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C3 10772 bytes
SHA-256: 7c9682cdef471764d9988b8058caa77b6b7c1a3fdb8ac500ef719dd6efd6c43d

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