Malicious PDF — malware analysis report

Static analysis result for SHA-256 c12464a01fd863d7…

MALICIOUS

PDF

47.3 KB Created: 2020-08-10 15:18:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 619aa7daf30b9f80eea92a8eec2c9b4a SHA-1: 228aa3fbd1e847d71e7d1ba0520a1a67803d58ec SHA-256: c12464a01fd863d71965e4f3e39ee442d3f2a6712b76f44fabaa9efc06e37ddf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains a social engineering lure, presenting itself as a syllabus PDF to trick the user into clicking a link. This link, 'https://ttraff.com/pify?keyword=cds+complete+syllabus+pdf', is identified as a malicious redirector. The document also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm for SEO manipulation or to host further malicious content. The file's metadata indicates it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, which can be abused for malicious purposes.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/pify?keyword=cds+complete+syllabus+pdf
    • http://fabapuroz.amandacasale.com/uploads/1/3/0/8/130873995/nomifokegudozavud.pdf
    • http://files.rubywelsteadart.com/uploads/1/3/1/8/131856188/7282558.pdf
    • http://bizesov.druhatrava.us/uploads/1/3/0/7/130738870/lezuzadaje_napixolu.pdf
    • http://files.jlwarfield.com/uploads/1/3/1/4/131455463/rekoxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/remuwun.pdf
    • https://cdn.shopify.com/s/files/1/0432/0310/0836/files/reputewonodofutupitidamox.pdf
    • https://cdn.shopify.com/s/files/1/0434/0813/0197/files/derazorewetetesurobatafux.pdf
    • https://cdn.shopify.com/s/files/1/0431/2337/6277/files/analysis_and_design_of_algorithms_by_udit_agarwal.pdf
    • https://cdn.shopify.com/s/files/1/0432/8423/4398/files/rexaturakovil.pdf
    • https://cdn.shopify.com/s/files/1/0434/7320/7446/files/nexawesawitunamulizup.pdf
    • https://cdn.shopify.com/s/files/1/0435/2904/4127/files/fopusilaruje.pdf
    • https://cdn.shopify.com/s/files/1/0428/9842/3967/files/nofajafomozenabaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/6219/0499/files/zudiwujabeta.pdf
    • https://cdn.shopify.com/s/files/1/0434/7386/2821/files/wolub.pdf
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/tusog.pdf
    • https://cdn.shopify.com/s/files/1/0435/5319/4133/files/ralipemenavewolop.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/magobusiriwolozun.pdf
    • https://cdn.shopify.com/s/files/1/0428/4999/2870/files/json_cheat_sheet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007028.bin
0c59cf1adc4bdd927048b70cc1b07248349ce704f324a5f3007ff28cfbf13382		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7028 5352 bytes
font_01_sfnt_off00008251.bin
fc70f8b35d51baa78c4725ecf018bfe6893ff46ea9e28ebc8a4382b7ddea6676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8251 14728 bytes

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