Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf4fd2581e677ade…

MALICIOUS

PDF

41.5 KB Created: 2020-11-08 12:06:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 258c8ad804e260ef63b937d75cf13fcf SHA-1: 1420963cf543d8c19852067fcf037c8c308c07f4 SHA-256: cf4fd2581e677ade587da2d81db6cc2603a5639160a4cae2e63885dae487ab7c
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/aws?keyword=anthony+wayne+united+soccer'. The ML classifier also flagged this PDF with high confidence. While no scripts were extracted, the embedded link is the primary indicator of malicious intent, likely serving as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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?keyword=anthony+wayne+united+soccer In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370744/normal_5f8e7a992437d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376354/normal_5fa1a82e12e62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423171/normal_5fa716cf0bf3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391308/normal_5f90e2f21e2d6.pdfIn PDF document text
    • https://gupupekulumo.weebly.com/uploads/1/3/4/1/134108922/98426.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/27f9576a-81a0-45ff-801c-2a30d7ae7aeb/xbox_live_gold_codes_generator_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a92783e-5300-41e0-8b52-855c7a906aec/business_communication_a_problem-_s.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/the_letter_m_in_dusty_divot.pdfIn PDF document text
    • https://ragejaso.files.wordpress.com/2020/11/47761671932.pdfIn PDF document text
    • https://romekelisefo.files.wordpress.com/2020/11/nitunawikudaremutujozudok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88abc265-0db8-44c8-918e-4fb726a98f30/linux_tutorial_tutorialspoint.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000041f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41F6 5060 bytes
SHA-256: cd2a5ac79ff2be8ab819d303723439f8d28682d9e642ba3ee86e65f0b3592ece
font_01_sfnt_off0000532e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x532E 10280 bytes
SHA-256: 4a79dcc3b48bb34daf34c26f30ff89a65d7ef2eb95d81eaab088ee7ca79a21bb
font_02_sfnt_off000075d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D9 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd
font_03_sfnt_off00008b06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B06 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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