Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb122ebb2b828cfc…

MALICIOUS

PDF

40.7 KB Created: 2020-08-12 01:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fec9845a6b0f3a656d13d1c4245f8c1c SHA-1: 1d25ebd9557ffd6427d9c3f57002efa6f30a5b9c SHA-256: cb122ebb2b828cfc0a5b0262b7d1cd1cbb730f77b935d315c648c03cb6225ba8
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body presents itself as a '2015 volkswagen tiguan user manual' and contains a link to `https://ttraff.cc/wb?keyword=2015%20volkswagen%20tiguan%20user%20manual`, which is likely the initial lure. The PDF also contains a mass external PDF link farm, with many links pointing to Shopify-hosted PDFs, suggesting a SEO poisoning or link farm tactic to distribute the malicious URL.

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=2015%20volkswagen%20tiguan%20user%20manual
    • http://zezesom.houseoflightuk.com/uploads/1/3/2/6/132680813/mikojulawitif.pdf
    • http://files.raydickaty.com/uploads/1/3/0/7/130775304/totupib.pdf
    • http://files.stuarthabley.com/uploads/1/3/0/8/130814715/nirur.pdf
    • https://cdn.shopify.com/s/files/1/0430/6518/0321/files/42809354136.pdf
    • https://cdn.shopify.com/s/files/1/0431/0905/6668/files/61021550975.pdf
    • https://cdn.shopify.com/s/files/1/0430/8877/3269/files/guwiguj.pdf
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/libelurakugamosaxevu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1430/6467/files/skewed_normal_distribution_function.pdf
    • https://cdn.shopify.com/s/files/1/0434/7048/7712/files/scert_haryana_books_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/html_to_javascript_jsfiddle.pdf
    • https://cdn.shopify.com/s/files/1/0433/6523/6895/files/sijewurimovorivotepeve.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94229011204.pdf
    • https://cdn.shopify.com/s/files/1/0435/2534/1343/files/gate_2020_ee_solution.pdf
    • https://cdn.shopify.com/s/files/1/0428/4468/4454/files/vunadimidumamomoge.pdf
    • https://cdn.shopify.com/s/files/1/0431/4152/9754/files/79496024978.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_off00005fd5.bin
3229f327ede5f8c50a8fb0e29ad66491a5a09f1637d20c3d639b3b3190321626		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD5 5576 bytes
font_01_sfnt_off000072c9.bin
ee06efc75af964259a114715cb969b0be5632b21e1aec28e9242cdeefdda1c33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C9 10272 bytes

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