Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0ceafddd989ca4…

MALICIOUS

PDF

72.0 KB Created: 2020-12-05 18:41:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 8f1ca71542b5ffd776b25223b64e3b98 SHA-1: d2882d63943e93c0267c14fccbc04304002a0def SHA-256: 8e0ceafddd989ca47e8a343f3d7d292965ac9fb3fef10de3c406862403335b12
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/aws?utm_term=gpupdate+report+html'. This URL is the primary indicator of malicious intent, suggesting the document is designed to lure users to a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffmen.ru/aws?utm_term=gpupdate+report+html In PDF document text
    • https://cdn-cms.f-static.net/uploads/4392209/normal_5f94e727ade64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370088/normal_5f9c8a5bb25c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427781/normal_5fae979d3a4c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390637/normal_5fae0f8e19b7e.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/bitajemisajoz/nadipirumifo.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/94047509232.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb776123-c85e-4093-893d-4ed58a2571cd/90083402225.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/ibm_retiree_discounts.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/36928329627.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/anthem_answers_hq.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/gulilojaravavi.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_off0000daf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF8 5052 bytes
SHA-256: 828d0e19aa29d62cc27cadd8a6afdf9a8cecad5aa9c33b6840c7f8a484ec337c
font_01_sfnt_off0000ebfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFC 11600 bytes
SHA-256: d39607330a031ce0e439f8d7af1c2084bd28c94a9c674f7aa173bcd07411e9bd

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