Malicious PDF — malware analysis report

Static analysis result for SHA-256 497f695fc0ec0f33…

MALICIOUS

PDF

44.1 KB Created: 2020-08-30 06:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47e045aad46f3865e50daadc31f6514c SHA-1: 057f8c8848e96e98305d8fe47f0eddc8c9a7b16a SHA-256: 497f695fc0ec0f338c25066bd29e31f40634318477b7056f84c2173b48730d8e
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to Shopify-hosted PDF documents. One of these URLs, 'https://ttraff.ru/wix?keyword=principles+of+neurobiology+liqun', is flagged as a malicious redirector. The document body contains garbled text and metadata indicating it was generated by wkhtmltopdf, suggesting it's not a typical user-facing document but rather a programmatic construct for distributing links.

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/wix?keyword=principles+of+neurobiology+liqun
    • https://cdn.shopify.com/s/files/1/0432/0896/6306/files/66659231292.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/arabic_english_translation_quran.pdf
    • https://cdn.shopify.com/s/files/1/0437/0222/3013/files/impact_of_colonization_in_africa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/15280843351.pdf
    • https://cdn.shopify.com/s/files/1/0431/5552/1700/files/70594938096.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/vosarotatobirotun.pdf
    • https://cdn.shopify.com/s/files/1/0434/2199/1079/files/49705211079.pdf
    • https://cdn.shopify.com/s/files/1/0428/2440/1063/files/zubefopapuwa.pdf
    • https://cdn.shopify.com/s/files/1/0432/0506/6913/files/dalinoxirobirubidufoxezi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5335/1066/files/98390137402.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3789128943.pdf
    • https://cdn.shopify.com/s/files/1/0434/8562/6520/files/generator_automatic_transfer_switch_wiring_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0433/9548/1750/files/jonufogurelegebowijeziwur.pdf
    • https://cdn.shopify.com/s/files/1/0447/5407/5799/files/nurodumarij.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_off00006e1d.bin
c7fd03d173f729c132ca9a13582fcbc038fcfa2beeded4850a68b729bddacf9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1D 5344 bytes
font_01_sfnt_off00008057.bin
31e04b161f15f47f36e4160155f2d552f837df6f46564a82cbbc513587fd16a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8057 10608 bytes

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