Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a484f665548a6a7…

MALICIOUS

PDF

39.1 KB Created: 2020-08-17 03:27:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c210048d2658b9daaa69de160b4bda83 SHA-1: 358a3a396ce7aeb4ddba196297d936e3c382e819 SHA-256: 2a484f665548a6a7f5d09da2570775e530ce9061e5c272dff61f6af40343b568
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=coordonn%25C3%25A9es+d%2527+un+vecteur+pdf'. Additionally, it features a PDF link farm with numerous external links, many hosted on Shopify, but one on 'pefomas.draff.net' is also flagged as unknown. The document body, though heavily garbled, contains the same redirector URL. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves luring the user to a malicious site via a deceptive link.

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.
  • 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.
  • 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=coordonn%25C3%25A9es+d%2527+un+vecteur+pdf
    • http://pefomas.draff.net/uploads/1/3/1/4/131437436/30795d.pdf
    • https://cdn.shopify.com/s/files/1/0432/0837/6482/files/56297432109.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15518423203.pdf
    • https://cdn.shopify.com/s/files/1/0435/2350/6336/files/jabudasame.pdf
    • https://cdn.shopify.com/s/files/1/0428/2158/3004/files/xatojatexinamuxobupa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8267/0485/files/ledanalajulos.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/68036212268.pdf
    • https://cdn.shopify.com/s/files/1/0433/4505/1797/files/lewupugijifop.pdf
    • https://cdn.shopify.com/s/files/1/0430/8379/2548/files/dewan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93527538138.pdf
    • https://cdn.shopify.com/s/files/1/0432/3796/5986/files/shl_deductive_reasoning_test_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/7008/7587/files/45169354752.pdf
    • https://cdn.shopify.com/s/files/1/0431/6289/4495/files/87694435901.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_off0000583c.bin
23aa644bddbb5327c3820822b8df4e838852a7889200c8a065e15813ba56756d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x583C 5048 bytes
font_01_sfnt_off00006941.bin
3132d575f14b6cb3eb7c2158e63994506d039cd9f93a6ce10a1d9128ae0f5f52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6941 11388 bytes

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