Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c236ec51ecc516e…

MALICIOUS

PDF

39.9 KB Created: 2020-08-24 23:39:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f42d31f3c8a4c581b46065b8b8e6f77 SHA-1: cae623806dcb3e88994a371468f01ae0ab296150 SHA-256: 8c236ec51ecc516e9728b93d930e085ecf60b6876d057b3ddd502d9b8af900f0
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, identified as a PDF link farm. One of these links, 'https://ttraff.ru/pify?keyword=what+is+baseline+survey+report', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other Shopify-hosted PDF links, suggesting a coordinated effort to drive traffic to potentially malicious sites. The primary goal appears to be directing users to external resources that likely host further 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=what+is+baseline+survey+report
    • http://dotadofo.johnachten.com/uploads/1/3/1/3/131383664/133ec.pdf
    • http://files.juantp.com/uploads/1/3/1/1/131164556/zipononu_lodivitevap_tonimuw_pajixiditavo.pdf
    • http://ditowino.danielltutoring.com/uploads/1/3/1/4/131453134/3555886.pdf
    • http://vevel.qslowsmoked.com/uploads/1/3/1/4/131406535/5563854.pdf
    • https://cdn.shopify.com/s/files/1/0431/5539/0630/files/moxafilez.pdf
    • https://cdn.shopify.com/s/files/1/0433/9879/1333/files/calcul_metabolisme_basal_formule.pdf
    • https://cdn.shopify.com/s/files/1/0454/7330/0632/files/joint_probability_distribution.pdf
    • https://cdn.shopify.com/s/files/1/0435/1927/9258/files/wufikosibon.pdf
    • https://cdn.shopify.com/s/files/1/0432/3734/3387/files/counselling_skills_for_managers_kavita_singh.pdf
    • https://cdn.shopify.com/s/files/1/0428/4357/0343/files/rt-_n66u_tomato.pdf
    • https://cdn.shopify.com/s/files/1/0432/9956/9832/files/dipipasuxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/13540545454.pdf
    • https://cdn.shopify.com/s/files/1/0438/6498/1664/files/learn_portuguese_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/3936/7061/files/42441001163.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_off00006084.bin
8db08c1a1a0a73634a8db397d71c95eae7a9e2f3fcbe09eb340fddcf401a0575		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6084 5220 bytes
font_01_sfnt_off00007245.bin
95a7e8bd304496265d5bfa9c3ea0e386a7798058bbdf0cda9604d604ea2a3c71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7245 9616 bytes

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