Malicious PDF — malware analysis report

Static analysis result for SHA-256 e53ff0fdf8f2d52f…

MALICIOUS

PDF

73.9 KB Created: 2020-11-13 06:27:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 504cb9b70e08431a957bf09ef4efd6bc SHA-1: b5e661a3ea35fa2ae1e749922a28f823cc9888e3 SHA-256: e53ff0fdf8f2d52f0b028f7852ccb9ed3abf9d45031f52a3cff96085ce533022
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ggtraff.ru'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=aplikasi+blender+3d+gratis In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390374/normal_5fad6cc8910f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369191/normal_5f8a6eea8acdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385415/normal_5f98e7f3621f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387704/normal_5fa9d444ddd90.pdfIn PDF document text
    • https://vupimolafi.weebly.com/uploads/1/3/1/3/131398504/sojeviledepotamub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383132/normal_5f9c514f834f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420019/normal_5f9839b2e3782.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403128/normal_5f925f1aa5d4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372073/normal_5f8bc04e786ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484359/normal_5fadc0e94c535.pdfIn PDF document text
    • https://kupifibadobibe.weebly.com/uploads/1/3/4/5/134512214/sugivozofapubem_sixoz_bopedoko_jowamimi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/aa8a77e4-9aff-4bb3-9d54-c9721b91e517/13638747460.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FF 5160 bytes
SHA-256: 265e0c7ef50d43a1cb842130af519808dbb091d8a5cc0c18f32c29de2f10e8e2
font_01_sfnt_off0000e77b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77B 10940 bytes
SHA-256: 8c85a678a546cc1ec17172098a1d8192dc1aaaf3a43b3cd008f3748fd86b91d5
font_02_sfnt_off00010cba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBA 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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