Malicious PDF — malware analysis report

Static analysis result for SHA-256 d84618037ab95eef…

MALICIOUS

PDF

126.2 KB Created: 2020-11-25 06:17:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c870ec0252c881ee01b485847c01ce05 SHA-1: 58e4c3635e8378d18e4d515569acff85a5fd36a9 SHA-256: d84618037ab95eef11629c06514521b5914ed6082980e3fd5b4b46b07aa014f7
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggtraff.ru, disguised as a search result. This indicates a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly support the malicious nature of this file. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

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://ggtraff.ru/123?utm_term=samuel+taylor+coleridge+poems+kubla+khan
    • https://cdn-cms.f-static.net/uploads/4401732/normal_5fa6b4fdb0b4c.pdf
    • https://cdn-cms.f-static.net/uploads/4368467/normal_5f881b8142ab3.pdf
    • https://cdn-cms.f-static.net/uploads/4453129/normal_5fb42e203acc7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7b4502a8-eaab-4be7-b2f0-1e0ca4c1bbaa/international_sex_guide_dubai.pdf
    • https://uploads.strikinglycdn.com/files/d52607e1-db4c-4efe-a2a8-eb4aac981c49/marieb_10th_edition_free.pdf
    • https://uploads.strikinglycdn.com/files/f9061839-a71e-4e6b-b2e8-9b79c5ce1817/16283028413.pdf
    • https://uploads.strikinglycdn.com/files/67f1c8d3-cd33-4c12-a48d-040f8eb81c22/juvimanilasozakeletiwab.pdf
    • https://s3.amazonaws.com/penale/1999_polaris_jet_ski_slth_service_manual.pdf
    • https://s3.amazonaws.com/jamokaroxoj/birexiradavaninafojezi.pdf
    • https://s3.amazonaws.com/pizexopenaxu/76252993890.pdf
    • https://uploads.strikinglycdn.com/files/b38b0d20-e8b0-4baf-9ddf-577e244755ac/16195205844.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_off0001b010.bin
b10373b8b0388f84ecf3712680af1f9527a092ccb8d570023089b68c8dd44282		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B010 5896 bytes
font_01_sfnt_off0001c3fc.bin
6be5b0501085c1abb9608335a8f5752d9a9aa1ec64abdcaa78e55b0c551a4020		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C3FC 12300 bytes

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