Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fddff0a4a7cb6c9…

MALICIOUS

PDF

41.9 KB Created: 2020-10-27 22:51:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2e22cf7a032abfd3049ab0ccce2ac089 SHA-1: 01e8c76ce1aea2c84923e576dab8765e97a39c29 SHA-256: 8fddff0a4a7cb6c9bf5f62aed1f154310379b7cc29acd427573d13a6a5fa03ef
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://ggtraff.ru/strik?keyword=ri+department+of+health+emt+license, is the primary indicator of malicious intent. While no scripts were extracted, the PDF structure and the malicious URL strongly suggest a phishing or malware delivery attempt, likely initiated via spearphishing.

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://ggtraff.ru/strik?keyword=ri+department+of+health+emt+license In PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/netajexotikawita.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388629/normal_5f8e5d5cabcf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f8926a43bce0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388037/normal_5f94cf8064907.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375690/normal_5f91306b9706d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371258/normal_5f8fd994918d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375515/normal_5f8a1e3e83fd8.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/sugaguxagu/ascending_order_and_descending_order_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/722464993.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/vajurupubopipal.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/rojovudokerepiwomelitexok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1372/9179/files/lacasa_de_bernarda_alba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/9045/6991/files/walter_riso_libros_me_canse_de_ti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/4080/2469/files/munire_convertible_crib_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9864/5404/files/lusilubenasovagepogezox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3331/2925/files/buwupifolevijusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/3288/7463/files/dotin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7808/1959/files/faxasolovupozamulude.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_off00006445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6445 5404 bytes
SHA-256: 5178d32a0a38cba7fe1c7b59f997be82b57eb794d825e556591c1f277ad7e944
font_01_sfnt_off0000767d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x767D 10628 bytes
SHA-256: 651826c617540ba64385d83240a6b0f5ae302b08677a2eb7bb703ad717a4a409

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