Malicious PDF — malware analysis report

Static analysis result for SHA-256 edacd8b06f19f1c0…

MALICIOUS

PDF

68.2 KB Created: 2021-01-06 05:31:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 90b2c275848857e23be54724c87acbff SHA-1: 6887c85e9f94c844c060b5917a0614dee04412cf SHA-256: edacd8b06f19f1c04332a685dd0390640612c9cfbb511d369975d5bda7ef8201
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical alert for a redirector link to 'traffine.ru'. The ML classifier also assigned a very high probability of maliciousness. The embedded URL is likely used to lure the user to a phishing site or to download a secondary payload. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/aws?utm_term=child+care+design+guidelines+nsw In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f9750e7544bd.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxugaveg/kgigzhe/lirokebisumirite.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490116/normal_5feb4ba6162b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408853/normal_5f9da38e95cbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451355/normal_5fa2a4a17ba4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458631/normal_5fb2b29c94476.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370528/normal_5f95d9cc55bbc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ca173cd-e550-40c2-b9fa-c3636b3a9ab5/jugazogojomoruvifijosotut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84b1247d-bc49-40f7-8a16-467866e5cc66/princess_bride.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aad8e29-ecd8-43a7-a897-449d688c9f0b/3m_maplewood_mn_building_224.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/428c98ea-0164-4bb4-a6c2-da36cd1d0598/71974595322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc304d4d-a0d1-4db5-bd4d-7e357b17a700/4912275325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/855db802-0870-42b5-83dc-c4ad3af28042/literary_foil_definition_espaol.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_off0000d066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD066 5200 bytes
SHA-256: 60155ab346cc91c0852bf0586085170438df2bf777361527d0616558c99c70a3
font_01_sfnt_off0000e213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE213 9888 bytes
SHA-256: 03828dae8a34cc85917130a1307a88e6f48ad7ef285d62a3ef7e4c83bb2080f6

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