Malicious PDF — malware analysis report

Static analysis result for SHA-256 98e63bf6471b35cc…

MALICIOUS

PDF

32.4 KB Created: 2020-10-12 02:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 126b25db538674011e1359a2a1c794e6 SHA-1: f0ac95974b91dc19e05088c68cd6d383acb2e0e6 SHA-256: 98e63bf6471b35cc38a5d3300619061f8a0cc17b9a1c43a867cb8f78b8063e1f
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, also contains the URL for the malicious redirector and several other PDF files hosted on seemingly benign platforms. This suggests a link farm or phishing attempt designed to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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?keyword=transportes+caribe+express+rastreo In PDF document text
    • http://files.sharonbohjanen.com/uploads/1/3/0/7/130740376/912816.pdfIn PDF document text
    • http://files.ggsastrophotography.com/uploads/1/3/0/7/130776277/4201025.pdfIn PDF document text
    • http://files.inallseriousness.com/uploads/1/3/1/3/131379719/789149ea9d.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/44914892-f060-42a9-b539-fffb06efd6c3/59703193878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9e13eee-9cfe-403f-bde5-6c4ddf06ccc2/kanelasuvod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/206c4c54-6568-43e3-9989-f2e8d74f3e87/31749869754.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5521c9c3-ef73-4382-a9d6-9c9125f5d2a7/bajuvajejamoguwesupe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d0346db-b7bd-4a08-ab01-ca8d7c12ff10/78153774252.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0734/7368/files/8-32_unc_clearance_hole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4301/2256/files/swtor_level_boost_token.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3759/6580/files/zizupezogepirivojekutuge.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_off000041b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41B4 5052 bytes
SHA-256: 0b03125cf9fcba42bc94ee846c58b0fa01c9bad601d77bfc5bcfd8eeaec0b511
font_01_sfnt_off000052e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52E6 9944 bytes
SHA-256: a2d5f3001b3fd9de035371bbdcbccef879a129741a06dcc6b8c85e4c95ff8fe3

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