Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a38a9b81918a6d1…

MALICIOUS

PDF

73.3 KB Created: 2020-11-23 05:45:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4610dbc2468a0ca8cccc46b924460f7 SHA-1: 26c285971a7f176b6a61007d0aef8c2d9bec4b36 SHA-256: 3a38a9b81918a6d19b46a57df0117d1709412ef0a9831698bf0d42ba4a9305d6
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 URL is likely used to lure users into a phishing or malware download page. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/123?utm_term=bosch+evolution+500+series+dishwasher+reviews
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f870e49e7d93.pdf
    • https://cdn-cms.f-static.net/uploads/4365562/normal_5f86f5a82c737.pdf
    • https://cdn-cms.f-static.net/uploads/4368750/normal_5f8efad5cc649.pdf
    • https://cdn-cms.f-static.net/uploads/4473062/normal_5fabd31fb2561.pdf
    • https://cdn-cms.f-static.net/uploads/4476601/normal_5fb9d06014b84.pdf
    • https://cdn-cms.f-static.net/uploads/4380079/normal_5f9e3eb6a71d6.pdf
    • https://cdn-cms.f-static.net/uploads/4369161/normal_5f8d8e8a3942b.pdf
    • https://cdn-cms.f-static.net/uploads/4413239/normal_5fa4cc33cb503.pdf
    • https://cdn-cms.f-static.net/uploads/4368951/normal_5f9dc6f8b2bb8.pdf
    • https://cdn-cms.f-static.net/uploads/4457848/normal_5fa61d7db5b3a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/wixanarer/clementine_desseaux_measurements.pdf
    • https://uploads.strikinglycdn.com/files/534675b2-c473-45d1-8bdf-152f95503244/lexmark_z640_driver_download_windows10.pdf
    • https://uploads.strikinglycdn.com/files/06082ecb-69ce-4d23-8586-69d1c1b4a728/half_pint_microwave_for_sale.pdf
    • https://uploads.strikinglycdn.com/files/c72fbcf4-760b-4084-ae9a-7b8da439f261/wedding_planning_checklist_google_doc.pdf
    • https://uploads.strikinglycdn.com/files/622c5e4b-eb65-490c-8d72-e81709f953bf/eso_anvil_location.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1af.bin
fd71ad7412ae51403b8ef56cf91e05fae3611763d7735235fa4a7d2c1a8e7c9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AF 5376 bytes
font_01_sfnt_off0000e400.bin
1d97f951f966f97fde236024904dc27144e830a711a0a4253ae904740551ef82		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE400 11012 bytes
font_02_sfnt_off0001096e.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1096E 4324 bytes

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