Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff3d30b74730b34…

MALICIOUS

PDF

80.6 KB Created: 2020-12-07 23:46:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 29749b126808fe0b4079aeabdaa9eeca SHA-1: 19e42c38463e03eebd9a4a2fa0a46cd408f15fc7 SHA-256: bff3d30b74730b345b8717c048e526582d179154c49afbe2b37af4eb728b3650
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'traffine.ru', which is also listed as an embedded URL. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of a malicious URL suggests a phishing or redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://traffine.ru/strik?utm_term=thordsen+pistol+stock In PDF document text
    • https://static.s123-cdn-static.com/uploads/4366625/normal_5fcdc3454460d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375896/normal_5f8b3935c8aa9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408702/normal_5fc535ebe566b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375698/normal_5f8a42ab0181a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451217/normal_5fa84a589fef2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386839/normal_5f9e3463a8d0e.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/zabevog/klh_asw10-120_powered_subwoofer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/matthew_gray_gubler_2019_age.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/how_to_write_an_effective_book_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/arya_2_movie_songs_sensongs.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/procedimiento_de_auditoria_financiera.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc174bcc89e1c4b8fc25c90/t/5fc8f8f51dc2957330fb071a/1607006454579/minecraft_earth_skin_missing.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_off00010243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10243 4964 bytes
SHA-256: 2ae818370e1380c0f4678fd8c9e01659c6e831911d5227479cdd60848cea21f5
font_01_sfnt_off00011320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11320 10232 bytes
SHA-256: c7828e0f003041f051330229ead3dd277aa98bd6eadecb48d50938575a4bb723

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