Malicious PDF — malware analysis report

Static analysis result for SHA-256 80b99f00f5dcdc38…

MALICIOUS

PDF

34.1 KB Created: 2020-08-21 09:38:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b81f61cd7426a05d3e8aed1d6e32049 SHA-1: 0f0dc1518899a50e9dd1776f0e0516b0fb0bb0bf SHA-256: 80b99f00f5dcdc38dfbb016e1ebf39de42a52a37ca491abf04097133b5838172
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link farm and a malicious redirector. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=cadillac+xts+2016+manual', which is likely used to obscure the final destination of the attack. The document body contains garbled text and metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

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=cadillac+xts+2016+manual
    • http://files.danielahdz.com/uploads/1/3/1/8/131871786/ba2361b4dcdac.pdf
    • https://cdn.shopify.com/s/files/1/0447/7878/2869/files/pathogenesis_of_pneumonia.pdf
    • https://cdn.shopify.com/s/files/1/0435/3071/5288/files/95293565985.pdf
    • https://cdn.shopify.com/s/files/1/0438/9155/6504/files/23816747348.pdf
    • https://cdn.shopify.com/s/files/1/0435/6092/7393/files/equilibrio_acido_base_veterinaria.pdf
    • https://cdn.shopify.com/s/files/1/0434/5580/7654/files/xikadinadenu.pdf
    • https://cdn.shopify.com/s/files/1/0439/5221/0088/files/simezaladobetusedire.pdf
    • https://cdn.shopify.com/s/files/1/0433/2158/9913/files/todole.pdf
    • https://cdn.shopify.com/s/files/1/0438/1281/5008/files/cardiopulmonary_resuscitation_articles.pdf
    • https://cdn.shopify.com/s/files/1/0428/8187/6131/files/73881890198.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_off000047bd.bin
6ad58b7b25571a1dc14326604cab1a99ed5fabbfe1e25df55b621c03ae0a6080		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47BD 5444 bytes
font_01_sfnt_off00005a30.bin
a9e7ce40d928151a59d30f6d045f9a9129c546cc8ce984429d295c885e08b83e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A30 9944 bytes

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