Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd0e056ff8f4ae9d…

MALICIOUS

PDF

67.2 KB Created: 2020-12-22 02:38:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: ea20ae608dbb44bbd05a19ff4699c5e2 SHA-1: eefbb6a7697cdb8e564ccc31e2f0e5d9cdf43ee1 SHA-256: cd0e056ff8f4ae9dfb731d6582ccadb1f30fa027d4a54c0ebda826722b8576fb
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, 'https://ggtraff.ru/aws?utm_term=diabetes+insipidus+clinical+practice+guidelines', is the primary indicator of this malicious activity. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing and redirection attack pattern.

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/aws?utm_term=diabetes+insipidus+clinical+practice+guidelines In PDF document text
    • https://static.s123-cdn-static.com/uploads/4486552/normal_5fcc1ad20372d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425224/normal_5fbdcde09101f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0ea6ac6229360ecad0c46/t/5fc6a45ef8cdb769c6cdb959/1606853729729/54328080014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9896c780-1ffa-4855-8ca1-d25bf284f75c/gatug.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6d94810d6a92a73684d99/t/5fcb62a60814be4f73e83f30/1607164582669/vosabiwipiretedogeguvu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc65710085bf90c0e2241e5/t/5fcb600533fb14715cba7dd9/1607163911167/39905323568.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54ead21f-02e2-4067-b52f-4733bd2a4599/james_joyce_the_dead_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64996749-f26d-4b79-931a-51428bc7c271/pender_public_schools_pender_ne_68047.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf59b461e25426e12fdcd9/1606375864081/bizifutosebexijivimir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1de505c-383d-4d1b-9f57-397a7b619b76/accounting_principles_volume_1_weyga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8486e405-e858-4468-8a74-683039889805/xenegubironudofuxajevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c642f736-be1d-46a0-a7d4-5663b148928d/salegi.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_off0000cc23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC23 5380 bytes
SHA-256: b66977abb86f54f7c84de0bec9fcb4c9d62bf9d201231cd363fa06d121125eee
font_01_sfnt_off0000de72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE72 9880 bytes
SHA-256: 393663e29a5b8317128a3253138beaab6906958b114bebf48d87cd249be0f3a2

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