Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a9fc3b01bae7502…

MALICIOUS

PDF

59.7 KB Created: 2020-12-15 11:40:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a73c1d022dc1b2e6431c71ed8af0088 SHA-1: 193d8e670ada47356d64ddbe2567757f9dbca788 SHA-256: 7a9fc3b01bae75029ffd57cf259039d0df0979ea33d22191ec7f2d005e07a72a
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The file also contains a large number of embedded links, suggesting it is part of a link farm designed to obscure the ultimate destination. The primary malicious URL identified is https://ggtraff.ru/strik?utm_term=alderwood+mall+theater+regal.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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/strik?utm_term=alderwood+mall+theater+regal
    • https://static.s123-cdn-static.com/uploads/4483365/normal_5fcef98db9d83.pdf
    • https://jenititufevi.weebly.com/uploads/1/3/4/5/134595561/2264642.pdf
    • https://fanawilixu.weebly.com/uploads/1/3/1/4/131408209/safiregulo-nosazeniriwip.pdf
    • https://wisapemewe.weebly.com/uploads/1/3/4/7/134713478/nabajuwizufeb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/23093ccd-6a88-4cb3-a4ee-57d871c1d596/39714374677.pdf
    • https://uploads.strikinglycdn.com/files/a5f55003-3e23-4e44-bf79-27c19489cb9f/6999095589.pdf
    • https://uploads.strikinglycdn.com/files/c5a8d1f0-8327-4de9-a99f-abe13eca79f8/zedusavep.pdf
    • https://uploads.strikinglycdn.com/files/e560daa1-7622-485a-bb9b-701516f62b84/benoxunivab.pdf
    • https://static1.squarespace.com/static/5fc0f5b088c99b6d37a76c18/t/5fd19bf87c12252903efcf21/1607572473386/finger_soccer_board_game.pdf
    • https://uploads.strikinglycdn.com/files/b5e6de9d-f193-4409-9dd4-c802e9506ab7/nvidia_geforce_8400_gs_specs.pdf
    • https://static1.squarespace.com/static/5fc1b2877d0c8f249d4667bd/t/5fcdc742260a660a6bfb5def/1607321416893/world_war_history_in_telugu.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_off0000afc4.bin
1aa5295f6ea77f7681243e68a60ede56475af82214777f13ee777ef8ec7d3b25		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFC4 5144 bytes
font_01_sfnt_off0000c11e.bin
e3812aa8b06287f2458dbd347a46dcea59f46df626060c598e758b56ae54014d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC11E 9856 bytes

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