Malicious PDF — malware analysis report

Static analysis result for SHA-256 994f428084217309…

MALICIOUS

PDF

87.6 KB Created: 2020-12-27 14:40:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: bf20c9a31dcdfa3495b7a27e01be99d6 SHA-1: 16d1fa18232b91b5dae9dd3e1429426299c824aa SHA-256: 994f428084217309b4280a48fb282f991654bb0afb6e3601f710fcf69819c84d
214 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'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many of which are to PDFs. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing trojan. While no scripts were extracted, the presence of malicious links strongly suggests an attempt to redirect users to a harmful site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=matrix+organisational+structure+disadvantages In PDF document text
    • https://givefatilawasu.weebly.com/uploads/1/3/1/4/131454526/merugaguluf.pdfIn PDF document text
    • https://wapunukipebew.weebly.com/uploads/1/3/4/4/134440940/vamobixopapinumo.pdfIn PDF document text
    • https://vatedubajepe.weebly.com/uploads/1/3/4/3/134371970/favorujigafuj.pdfIn PDF document text
    • https://pojekemo.weebly.com/uploads/1/3/4/4/134469054/modobuzurexuponolazi.pdfIn PDF document text
    • https://fimuvuxufubewi.weebly.com/uploads/1/3/4/4/134442536/fafowuni.pdfIn PDF document text
    • https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/6420032.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/fibesezati/75837768851.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/tawiganetemufulubazakas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9d10318-11f2-4591-8dc9-49633d59a6fb/23354479977.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/77777812928.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30c8f5d4-0967-4632-b096-b7b2296aaf9d/miami_county_ohio_clerk_of_court.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/7333356705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b47ff267-b124-4ecb-97c5-bc291591daa4/nixevujukexujibovorulusoz.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/duxafegonari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b71b5569-fae7-43e3-8631-71c203c52ba4/apes_review_worksheet.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_off00011a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A8F 5240 bytes
SHA-256: cc10cfe267c8463015306b45f7b3c1604b45cbada5eef6ff989c31f7479b9ded
font_01_sfnt_off00012c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C85 10140 bytes
SHA-256: 932b9198047fedfd8eb6a8e2524b0d297414fa9d7d91f8a1bf57b907a0457308

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