Malicious PDF — malware analysis report

Static analysis result for SHA-256 43fd35d5cfdab5f5…

MALICIOUS

PDF

53.4 KB Created: 2020-08-17 02:30:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa14997201506b165710dc7877830acf SHA-1: 7e2cbfbcbfeb2fd48cd6ffb7cc4aee12789cfd89 SHA-256: 43fd35d5cfdab5f5713d79c4333215971b30a1bc1af8dce1db0830b3cf3d30aa
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, a technique often used to obscure malicious destinations. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically identifies a link to 'ttraff.com', a known malicious redirector. Additionally, the 'PDF_SEO_LINK_FARM' heuristic indicates a large number of external PDF links, many hosted on Shopify, which are likely part of a link farm designed to improve search engine ranking for malicious content or to distribute malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=capitalism+1+game
    • http://files.mysmellysocks.com/uploads/1/3/1/6/131637362/wigokafadawok_vigurotekusel_mukadezuzaz_sodumotawed.pdf
    • http://files.dynamissconsultancy.com/uploads/1/3/1/3/131384583/fd1450.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7367/files/jilometegek.pdf
    • https://cdn.shopify.com/s/files/1/0450/7992/0803/files/animal_word_search_hard.pdf
    • https://cdn.shopify.com/s/files/1/0433/1778/8830/files/vowemosemi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4417/5013/files/denotation_and_connotation_worksheets_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/0013/3793/files/como_convertir_un_archivo_java_a_ejecutable.pdf
    • https://cdn.shopify.com/s/files/1/0430/8254/7361/files/74487622506.pdf
    • https://cdn.shopify.com/s/files/1/0429/0635/3823/files/paulo_coelho_libros.pdf
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/10098075253.pdf
    • https://cdn.shopify.com/s/files/1/0434/5397/2633/files/53405298188.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4507/files/advanced_bank_management_book.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_off000093aa.bin
27767c3e31c85f876b233f6b5adda1d559be514f7588568e6b94fdddde4a7247		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93AA 5000 bytes
font_01_sfnt_off0000a4a4.bin
42c97b3ebc12a163ea2d80499ee1cd27dcd8ae2564145fe93fe0d2bf4e3f7b04		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4A4 10652 bytes

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