Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa9ba8694d29c352…

MALICIOUS

PDF

80.3 KB Created: 2020-11-20 05:39:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: db88b4fc21eb84e4a2affa2cf22656ff SHA-1: 760d785100623307c0bafe647ba644f014d3e523 SHA-256: aa9ba8694d29c3526ad95ae9b664b143c7ffd0c72e8db8e7582d3d924891fc25
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier. It contains a large number of external links, with one pointing to a suspicious domain ('traffnew.ru'), suggesting a link farm or phishing attempt. The presence of numerous external links is a strong indicator of malicious intent, likely to redirect users to harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/123?utm_term=7+answer+family+feud+questions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393901/normal_5f9d939f1fdcb.pdfIn PDF document text
    • https://gorigopaf.weebly.com/uploads/1/3/4/3/134341526/jobalezuxuzoj-kidifudopobexap-furag-jevonunevowoti.pdfIn PDF document text
    • https://vadurevagide.weebly.com/uploads/1/3/3/9/133999829/jivukopabonav.pdfIn PDF document text
    • https://tebamebameden.weebly.com/uploads/1/3/3/9/133997375/dunajiwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369916/normal_5f8c83355011c.pdfIn PDF document text
    • https://nadunetuvopalo.weebly.com/uploads/1/3/4/8/134884029/4632726.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374857/normal_5fa77739e0c30.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/ce9d5fec-4980-4273-86ae-e0253d64d265/64378137198.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7ff93c8-2bd2-4478-897e-713c9b3f2aec/minolta_maxxum_5000_release_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3263999f-b952-47ec-94b0-8a4052694c93/87336534582.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84a29e60-085a-46fb-9b01-f35a0db9a2ec/la_historia_de_las_cosas_annie_leonard_resumen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6f132e3-7d43-411d-bd0d-1a8960065f8d/12342659772.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_off0000eed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED7 5240 bytes
SHA-256: 534b3febdaefec46087a51d7ca80bcd161ebf3b0114a17894ee2fb1cc72b773a
font_01_sfnt_off0001009b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009B 11064 bytes
SHA-256: bc281943dbc3c05c31fbc96c566f62e5a97a513eedfca78096f4d674872d57fc
font_02_sfnt_off00012662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12662 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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