Malicious PDF — malware analysis report

Static analysis result for SHA-256 356e9cb964bb863d…

MALICIOUS

PDF

39.1 KB Created: 2020-08-24 01:08:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7845a4b2074bb5776dd5356aaf466129 SHA-1: 8c3f01568064ec0768233bb21e407a95678477fc SHA-256: 356e9cb964bb863db6512ea6cdaa6b9e5b22e77a2c557674ac8c0e93bda0fb04
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic firing indicates a direct link to a known malicious redirector, ttraff.ru, which is disguised with a keyword related to electronics. The document body, though partially corrupted, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. No scripts were extracted from this sample.

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=best+bluetooth+headset+for+android+phone
    • http://files.lawrencecountydems.com/uploads/1/3/1/1/131163943/1362419.pdf
    • http://files.elishevaawendstern.net/uploads/1/3/1/4/131406303/wibukanoliwup.pdf
    • http://files.devonreiffer.com/uploads/1/3/0/8/130814717/zalutojajifanuv-meloperip-terar-beguruxamadad.pdf
    • https://cdn.shopify.com/s/files/1/0432/2613/6743/files/wow_warlock_pets.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2135/files/12653397193.pdf
    • https://cdn.shopify.com/s/files/1/0434/4548/5725/files/somoxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9957/8773/files/roxaturumadibe.pdf
    • https://cdn.shopify.com/s/files/1/0428/1057/2967/files/7970233978.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2335/files/48016065350.pdf
    • https://cdn.shopify.com/s/files/1/0429/2293/4435/files/7776299891.pdf
    • https://cdn.shopify.com/s/files/1/0449/1057/5771/files/ankylos_implant_system.pdf
    • https://cdn.shopify.com/s/files/1/0437/0553/2569/files/bread_bakery_business_plan_in_nigeria.pdf
    • https://cdn.shopify.com/s/files/1/0437/1854/1480/files/70174899680.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8083/files/ribemixula.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/craftsman_8_bench_grinder_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27347714529.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_off00005a58.bin
78c594498032585ea5708f59d86ea17bf28611b0e1306183678f3b2febe1498a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A58 5316 bytes
font_01_sfnt_off00006c5e.bin
e146c9aeb417bd94749c16cb38913ad3c1f0628f90879e5b168cf272301c3aea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5E 10248 bytes

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