Malicious PDF — malware analysis report

Static analysis result for SHA-256 74a10a739a8538f0…

MALICIOUS

PDF

71.8 KB Created: 2020-11-25 10:26:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d5257fbada9860dd25a78ef2b0d3341a SHA-1: 3964bf75edfff3dd311aa49fc2e7f37f8eda6757 SHA-256: 74a10a739a8538f0c3823945964a4919535611fa86f65f1968d97ef75aa94e4c
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV also strongly indicated maliciousness. The embedded URLs, particularly the one pointing to 'gettraff.ru', are highly suspicious and likely lead to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/123?utm_term=the+triumph+of+time+and+truth+libretto In PDF document text
    • https://bosategovatoz.weebly.com/uploads/1/3/4/8/134871083/428151.pdfIn PDF document text
    • https://guxadudupis.weebly.com/uploads/1/3/4/7/134751999/banesu.pdfIn PDF document text
    • https://jezaxegare.weebly.com/uploads/1/3/1/3/131380636/kuxameribaxusoviti.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/4b673990-9e75-45c4-847e-e81d3c3ffb3a/86235634301.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/advanced_wastewater_treatment_process.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/telefono_android_por_mercado_libre.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8e4656b-7a33-42d4-b77b-a25218f2d089/rovibowomimapodanodinaf.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/32362985586.pdfIn PDF document text
    • https://s3.amazonaws.com/mupakijivuruzim/ruvokeku.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/hsf_scholarship_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/vicky_s_nail_salon_coral_springs.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/93387696054.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_off0000cf26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF26 5076 bytes
SHA-256: 220b0b244c2e1cb154904b24d72cbb69dcdcd5a931e2dcff1f8cfa16677092a6
font_01_sfnt_off0000e032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE032 10648 bytes
SHA-256: 609d85e80027c6694ba1492a8184f93aae19fb29782d52d1690ecf27b22ac59a
font_02_sfnt_off00010465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10465 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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