Malicious PDF — malware analysis report

Static analysis result for SHA-256 95993face0bdd597…

MALICIOUS

PDF

41.7 KB Created: 2020-08-14 18:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa8d2f1417ea4afd2af5571281cd358a SHA-1: bc4e760e1e77cf5d3512558cd8077a0ecd5f7018 SHA-256: 95993face0bdd597653c53a61484104981401970090fd9c675eba2e5351a7db2
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.cc/wb?keyword=1992%20honda%20civic%20user%20manual`. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify-hosted PDFs. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirector URL and other PDF links, reinforcing the lure.

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.cc/wb?keyword=1992%20honda%20civic%20user%20manual
    • http://files.rudolphdesignco.com/uploads/1/3/1/3/131382955/tepexigatebub-fetozukige-nugiz-fukewura.pdf
    • https://cdn.shopify.com/s/files/1/0430/3260/8921/files/agriculture_marketing_agrimoon.pdf
    • https://cdn.shopify.com/s/files/1/0433/7732/8286/files/nomegugeburiza.pdf
    • https://cdn.shopify.com/s/files/1/0435/4532/9832/files/bootstrap_blog_post_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/57796823178.pdf
    • https://cdn.shopify.com/s/files/1/0434/3988/2402/files/81735255785.pdf
    • https://cdn.shopify.com/s/files/1/0438/2123/6384/files/71824502676.pdf
    • https://cdn.shopify.com/s/files/1/0434/1009/6284/files/graphic_world_inc.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dubisetebezurazoxodo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4015/3505/files/guxejidatinojokopipixa.pdf
    • https://cdn.shopify.com/s/files/1/0432/9200/0412/files/acretismo_placentario_ultrasonido.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_off0000650e.bin
d10ddbd1aac7c403859bf85db6fb98fac7e5b24858d2de1998ec6a17c6129057		 pdf-font-stream PDF embedded font (sfnt) at offset 0x650E 5484 bytes
font_01_sfnt_off00007787.bin
158637c1661c59c63fb21723554c3e2be35742f17b1da98b3a59215a0b2eecc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7787 10144 bytes

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