Malicious PDF — malware analysis report

Static analysis result for SHA-256 59a4bdaf1fd19e3a…

MALICIOUS

PDF

45.2 KB Created: 2020-08-14 12:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0661aef27b1de4bb0c392ba1a3202b01 SHA-1: c20d76ec87a544050097da7c36ff3a22e1eb173a SHA-256: 59a4bdaf1fd19e3a9152a6ddf8db677907a867026fe7e1538660fd01f42c9e13
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though partially corrupted, contains this same URL, suggesting it is the primary lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to benign Shopify domains, likely as a camouflage or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=contact+us+page+template+html5
    • http://files.gaetanaworks.com/uploads/1/3/1/4/131453429/4483504.pdf
    • http://files.lakebluffmac3.org/uploads/1/3/0/7/130775373/nilim_puriv_bobujuxizamakul_tabijuzel.pdf
    • http://vomolosi.speedlinellc.com/uploads/1/3/1/4/131412032/5962440.pdf
    • https://cdn.shopify.com/s/files/1/0437/8417/5773/files/fisiopatologia_del_pancreas_endocrino.pdf
    • https://cdn.shopify.com/s/files/1/0430/8949/4177/files/pivenegim.pdf
    • https://cdn.shopify.com/s/files/1/0432/5326/8642/files/fijorodulevilelewas.pdf
    • http://tuwujuwu.theraleighwineshop.square.site/uploads/1/3/0/8/130874474/16ae379ab9d9e.pdf
    • https://cdn.shopify.com/s/files/1/0434/6799/7344/files/91161514433.pdf
    • https://cdn.shopify.com/s/files/1/0431/3330/4993/files/63439018308.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/23599540215.pdf
    • https://cdn.shopify.com/s/files/1/0437/5435/6897/files/xenuro.pdf
    • https://cdn.shopify.com/s/files/1/0431/8196/5474/files/fibisorulegemavojul.pdf
    • https://cdn.shopify.com/s/files/1/0433/3751/5176/files/zewisimitetag.pdf
    • https://cdn.shopify.com/s/files/1/0431/8468/5224/files/6485176063.pdf
    • https://cdn.shopify.com/s/files/1/0436/2534/9283/files/94913018788.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_off000073e9.bin
b1ccbf3cba70b3e4184fdfdd07ab41036bfbe6cf769c2171f505e8d138b42f73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E9 5280 bytes
font_01_sfnt_off000085b5.bin
57fc66a7b9fc59dd09a939657dde106d95b5d79488f72df478fc5dbbf408a5b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85B5 9920 bytes

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