Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccb4cf342d09de4d…

MALICIOUS

PDF

69.8 KB Created: 2020-11-25 21:48:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: cfa60cdea9596ed3eeb5c2b883c5e004 SHA-1: 27a98c922e8d1eaceb5a289bae7acf86e3d0c3e1 SHA-256: ccb4cf342d09de4ddb5fbb0be1c1d19afa809d2f4ad10974b8804a999689b709
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/strik?utm_term=propiedades+de+la+materia+extensivas'. This indicates the document is designed to redirect users to a potentially harmful website. The ML classifier and ClamAV also flagged this PDF as malicious, supporting the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gettraff.ru/strik?utm_term=propiedades+de+la+materia+extensivas In PDF document text
    • https://cdn-cms.f-static.net/uploads/4425726/normal_5f9d8b9dec249.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482002/normal_5fb5a38bbf318.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374847/normal_5fa3a82b4144c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374533/normal_5fa1985f7e9c4.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/7bde9dde-cee8-4b44-9b0b-8726a9fafab7/essential_oil_perfume_recipes_witch_hazel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5306bd58-e8a8-4769-bb36-23ced1d2e4f0/sademotozan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/710b1eaa-5a64-405e-85fc-bdd0dc882df4/bismuth_electron_configuration.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2573118f-435f-4517-a75a-30aa57f7ed3f/stage_of_artistic_development.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/himnario_adventista_nuevo_163.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d65eef74-0462-4d1d-baed-baa2254fe63c/30014673442.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA86 5232 bytes
SHA-256: 5b966bc5c05716e39cd64d0f5104e9cdba3e28c2935832ccf48ebca57e917768
font_01_sfnt_off0000cc43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC43 12024 bytes
SHA-256: 7b8bfb05bf44ab4229a7383a83174374c04b2fca6adfe4cea7a5ee87a4a71dfd
font_02_sfnt_off0000f3a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A6 16144 bytes
SHA-256: fb10e5badbbf29d6a05184c763452604a6d256f7c208a2bb674868c670b14a78

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