Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff12a22a257df290…

MALICIOUS

PDF

52.7 KB Created: 2020-11-03 19:35:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0d49832fa2637acedd538437cf5ad182 SHA-1: cb28c84f9d2588b66efe9cbcb9f5d1a066280f67 SHA-256: ff12a22a257df290e4839ef950fef6337cb5a8bb97490d49e7d27875d60b2728
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text related to 'Merkury bluetooth headphones pure' and the malicious URL, suggesting a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious.

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://ttraff.com/123?keyword=merkury+bluetooth+headphones+pure In PDF document text
    • https://cdn-cms.f-static.net/uploads/4456989/normal_5fa11f70455e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379035/normal_5f8d7d4461ebb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368964/normal_5f8ff55c1b7f4.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/fipibemukojelarijup.pdfIn PDF document text
    • https://xukolewijox.weebly.com/uploads/1/3/4/3/134320036/namozujo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370077/normal_5f91bb53ed511.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370280/normal_5f900452e3d6f.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/16c1f135-2c3f-4251-b188-5ef06db64dc1/killer_life_4.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/aries_centuries_of_childhood.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d7a1033-452f-4338-abf3-7f46dfeea10c/xuvijefafilidixo.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/bhopal_gas_leak_disaster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6571656d-d4a4-4c35-b13a-e3a5370a3006/exercicios_de_funo_sintatica_dos_pronomes_relativos_com_gabarito.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/the_vintage_book_of_latin_american_stories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f743d57-b79f-4a46-b56d-33214d37b47b/mazegiganiku.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_off00008ae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE1 5360 bytes
SHA-256: 0b2d3c07b81ff303b5ca3542efadece49390e2e7695e798955ffe64957b791ff
font_01_sfnt_off00009d19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D19 12988 bytes
SHA-256: 4e818eb017105835be95746c8232e21ee27c6fcc8426055921f77f77686c938b

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