Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8129d857f85b774…

MALICIOUS

PDF

79.4 KB Created: 2020-11-30 15:43:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61ec30d74ac4b9c2ab4ce50bd0ea5484 SHA-1: 747481c474d8279af776458a3e9d8f12d09f472b SHA-256: e8129d857f85b774b5e53c5478deb708f9fb7b8d249fcd28d1dec796e244d435
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL 'https://gettraff.ru/strik?utm_term=historia+de+los+tres+jovenes+hebreos' is identified as malicious. ML classification and ClamAV also flagged this PDF as malicious, suggesting a phishing or trojan payload delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=historia+de+los+tres+jovenes+hebreos
    • https://cdn-cms.f-static.net/uploads/4385412/normal_5f93a37a6372e.pdf
    • https://cdn-cms.f-static.net/uploads/4370987/normal_5fa36b8fdcefc.pdf
    • https://cdn-cms.f-static.net/uploads/4464851/normal_5fb5150aac9ad.pdf
    • https://cdn-cms.f-static.net/uploads/4455195/normal_5fa3ad0c6803c.pdf
    • https://cdn-cms.f-static.net/uploads/4377403/normal_5fa34f8c62d88.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7c9d6279-f280-4614-a665-4b09ddcde357/dofijeverifevedumis.pdf
    • https://static1.squarespace.com/static/5fc3707fc14dfd36fe01a05a/t/5fc3ec7ebc819f1cf451f8b8/1606675584237/44680083597.pdf
    • https://uploads.strikinglycdn.com/files/eb02fa22-7009-4d2a-b249-c6efd33f1469/96323560755.pdf
    • https://s3.amazonaws.com/tetazino/lawegiluximixov.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd193f43516d6aa83da515/1606228287916/ymca_la_canada_summer_camp_2020.pdf
    • https://uploads.strikinglycdn.com/files/286c4508-cfe8-4c01-b2ed-d648c274ee92/gobijuba.pdf
    • https://uploads.strikinglycdn.com/files/8c53e44b-4658-4038-8adc-a2555c6084e4/lexuz.pdf
    • https://uploads.strikinglycdn.com/files/5379e2a8-0860-4d1b-81eb-d77cf3b43979/introduction_to_psychology_books.pdf
    • https://uploads.strikinglycdn.com/files/99187630-bc10-4f4d-a8d0-2de48c01a15a/wevowem.pdf
    • https://uploads.strikinglycdn.com/files/ced5aa5a-701c-454b-b954-354e1e948acf/tosobenen.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec9a.bin
b8e94486dcad187a584cb686df4c18545d04db89151972d10de97458b73dc4d6
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9A 5148 bytes
font_01_sfnt_off0000fe16.bin
0c7fb3f2e9318f08ac2bbaf55f9cb30f13604f6671f7b12aced6fa9ca7608dfa
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE16 16564 bytes