Malicious PDF — malware analysis report

Static analysis result for SHA-256 90891932dd5e5493…

MALICIOUS

PDF

68.3 KB Created: 2020-11-23 14:55:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a90161643e8b77de5cd93017d98f492a SHA-1: f78ad64bf12844e57cdb27abd11bb3ecbf9bf20c SHA-256: 90891932dd5e5493611b846decdbc71ab7495789a04907f472fabc36920e1259
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 'ggtraff.ru'. This indicates the document's primary purpose is to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is a high-priority indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=basil+of+baker+street+disney In PDF document text
    • https://nevijajemiwawo.weebly.com/uploads/1/3/4/3/134340376/vojuwesaj.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/39042860.pdfIn PDF document text
    • https://ponopuxebi.weebly.com/uploads/1/3/4/3/134365602/518c83bc6da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407331/normal_5fbab6fdc90cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451210/normal_5faa08bf70008.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/digigitusuduk/how_to_say_answer_in_spanish_language.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/mefetomupagegibup.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/fitutozajumijibi.pdfIn PDF document text
    • https://s3.amazonaws.com/moxekibupuru/himno_a_lempira_letra_honduras.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/towafat.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/diesel_cars_with_manual_transmission.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/angel_eyes_wet_wet_wet.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_off0000d20a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD20A 5256 bytes
SHA-256: 3522e6b4c585258837279b788e3ebc8c1bb9237b17d947ed1bb92d6c149b798b
font_01_sfnt_off0000e403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE403 9692 bytes
SHA-256: efbf9f14cc0dbbe0d0ad09a804cf7e7bb609e25932daeccf6bc018e6d653723d

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