Malicious PDF — malware analysis report

Static analysis result for SHA-256 b58d8adf23f29616…

MALICIOUS

PDF

38.8 KB Created: 2020-08-10 11:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 438bac1eee0d53426b41f33d6204ab3b SHA-1: 3d85af9631088ad6fe59a9983a451c08541f7535 SHA-256: b58d8adf23f296165638c0652381827f648537e0ed8607999974e66b29a342d1
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 pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This indicates a link farm strategy designed to obscure the final malicious destination. The document body, though heavily obfuscated, contains the target URL, suggesting the primary purpose is to redirect the user to potentially malicious content or phishing pages.

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=que+es+geotropismo+pdf
    • http://puketuko.alisonjerrydesigns.com/uploads/1/3/1/4/131406082/4109977.pdf
    • http://files.stephartist.com/uploads/1/3/1/1/131163788/98eb590e8808.pdf
    • http://files.hw-crane.com/uploads/1/3/2/7/132740423/9794017.pdf
    • http://files.considerhimoutreach.com/uploads/1/3/0/7/130738998/5637189.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7287/files/ranisub.pdf
    • https://cdn.shopify.com/s/files/1/0436/8944/3483/files/24936280880.pdf
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/wosonajiwuvowefatuvavib.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/sesojetij.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/50433426342.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/14985018959.pdf
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/32554000103.pdf
    • https://cdn.shopify.com/s/files/1/0430/8926/4794/files/zomapajopew.pdf
    • https://cdn.shopify.com/s/files/1/0438/2759/3376/files/alphabet_worksheets_grade_1.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/gurupa.pdf
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/67679896135.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_off0000599e.bin
88b8443d6f522d907d713ab9c5ceb8dceacc3d22cc6ff6b74eab801f1abf6c0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x599E 5180 bytes
font_01_sfnt_off00006b2a.bin
3edbbd3fe9ec4d0c29c9c6cfd251782f72d182cf96c09defb787c7f67c5f2658		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B2A 10412 bytes

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