Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4ec6df12e85d4e6…

MALICIOUS

PDF

35.0 KB Created: 2020-08-09 07:30:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a86621c1e68ee4a8cbb9154fbaea3dc SHA-1: b1ea523d0c928226040bbce53212405323639e09 SHA-256: d4ec6df12e85d4e6f60e264b2f642c9115407fcfa264592f926113dd966e2db0
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=elements+of+cartography+book+pdf'. This URL is likely used to redirect the user to a malicious site. The document also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm used for SEO poisoning or distributing malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=elements+of+cartography+book+pdf
    • http://files.sixthdaysnacks.com/uploads/1/3/2/7/132710780/rejadedemu.pdf
    • http://files.skin-spa.net/uploads/1/3/0/7/130738894/nafeni-gefamofuzafiwa-xapagej-ruzus.pdf
    • http://files.momentumdavis.com/uploads/1/3/1/3/131383842/renazitawomefuru.pdf
    • https://cdn.shopify.com/s/files/1/0431/0269/9681/files/mufasafiviv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5892/9570/files/gekaxejekididorisopemarug.pdf
    • https://cdn.shopify.com/s/files/1/0433/0517/3147/files/champion_3500_watt_generator_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/3337/9487/files/40017510390.pdf
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/english_words_in_kannada.pdf
    • https://cdn.shopify.com/s/files/1/0431/5381/7749/files/87357255346.pdf
    • https://cdn.shopify.com/s/files/1/0430/9640/8218/files/92257555392.pdf
    • https://cdn.shopify.com/s/files/1/0430/1701/1353/files/elements_of_applied_bifurcation_theory.pdf
    • https://cdn.shopify.com/s/files/1/0437/1018/5621/files/gawuzolafelupomube.pdf
    • https://cdn.shopify.com/s/files/1/0448/5827/8050/files/biomedical_waste_management_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0434/3349/2641/files/jakofeli.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/nios_dled_assignment_front_page_design.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_off00004a04.bin
a4363b42d26d5ce40da10b7b6d9eed0962d06cf12da8d349d6177c568fee8d81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A04 5832 bytes
font_01_sfnt_off00005db7.bin
4ab52763f8be8982cc5f2584539c5c59f2f7f417c37720108db951243b347543		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB7 9740 bytes

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