Malicious PDF — malware analysis report

Static analysis result for SHA-256 281035857ba2636b…

MALICIOUS

PDF

39.2 KB Created: 2020-08-19 13:40:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d4682da0258444c60f60139212295bf SHA-1: f2e6fa2e428a9b1544ba577fe01428ea5c220bb9 SHA-256: 281035857ba2636b520e2327b2366120d5b8938d37e34d5483ae864da11ef264
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm designed to appear as legitimate content related to professional certifications, but it redirects to a known malicious domain. The primary malicious URL is https://ttraff.ru/pify?keyword=formation+auditeur+interne+iso+9001+afnor, which is likely used to funnel victims to further malicious content. The document body, though heavily obfuscated, contains this URL and other embedded links.

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.ru/pify?keyword=formation+auditeur+interne+iso+9001+afnor
    • http://files.olivetcongregational.org/uploads/1/3/1/0/131070820/8859373.pdf
    • http://nusaxip.heartofcoloradofiberartsguild.org/uploads/1/3/1/4/131437914/2873680a.pdf
    • http://files.wow.yez.dk/uploads/1/3/0/9/130969300/950705.pdf
    • http://xoziwel.theabsolutemotivation.com/uploads/1/3/1/3/131398140/4966264.pdf
    • https://cdn.shopify.com/s/files/1/0437/6153/3082/files/33795445314.pdf
    • https://cdn.shopify.com/s/files/1/0429/4367/6582/files/18511986644.pdf
    • https://cdn.shopify.com/s/files/1/0435/8645/3663/files/kaxugavegel.pdf
    • https://cdn.shopify.com/s/files/1/0433/4842/6920/files/13269874737.pdf
    • https://cdn.shopify.com/s/files/1/0434/5800/3096/files/mirorol.pdf
    • https://cdn.shopify.com/s/files/1/0440/2796/9686/files/13581077985.pdf
    • https://cdn.shopify.com/s/files/1/0436/9140/9561/files/gta_online_best_apartment.pdf
    • https://cdn.shopify.com/s/files/1/0429/7372/4825/files/89464412839.pdf
    • https://cdn.shopify.com/s/files/1/0434/8837/9032/files/24006867234.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63491738983.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_off00005bba.bin
cc70810be539b90285a50306edd4562505d3a0692da81d235fca106f778166fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BBA 5324 bytes
font_01_sfnt_off00006db7.bin
719b9ce0834d339b2c5a08c657a443ddbd9b7e668ef2a7fe65d0ab9e30e329c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB7 10100 bytes

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