Malicious PDF — malware analysis report

Static analysis result for SHA-256 29f4623366c5cca5…

MALICIOUS

PDF

37.1 KB Created: 2020-09-05 08:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01dc4139334ca2ae96a31e674d48fbce SHA-1: d2fc96e4d3c102df0f470b07ace05da86c5f7c1d SHA-256: 29f4623366c5cca580e0beb875d25f97725d1e4a5aa6a306bcfb12d91d89f4a7
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.me'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm strategy to obscure the malicious destination. 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.me/wix?keyword=butterfly+life+cycle+sheet
    • https://cdn.shopify.com/s/files/1/0460/3143/7983/files/28674328571.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2520/files/53753075452.pdf
    • https://cdn.shopify.com/s/files/1/0430/5944/5914/files/cell_structure_and_function_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/0157/5586/files/regolamento_ufficiale_burraco.pdf
    • https://cdn.shopify.com/s/files/1/0437/6857/8210/files/laser_cut_templates.pdf
    • https://cdn.shopify.com/s/files/1/0437/4944/1687/files/eclampsia_management_guidelines_malaysia.pdf
    • https://cdn.shopify.com/s/files/1/0435/2199/9008/files/hdfc_bank_ltd_rtgs_form.pdf
    • https://cdn.shopify.com/s/files/1/0448/2046/3776/files/probability_problems_with_solutions_for_bank_exams.pdf
    • https://cdn.shopify.com/s/files/1/0435/2920/7957/files/apa_format_cover_page_word.pdf
    • https://cdn.shopify.com/s/files/1/0431/5509/5716/files/85476121943.pdf
    • https://static.usrfiles.com/ugd/ac72e0_855b392267914fd99c8e680e803fa09d.pdf
    • https://static.usrfiles.com/ugd/b8c837_4b3d2e4acaca41d0aa66ff906e5fabe5.pdf
    • https://static.usrfiles.com/ugd/34ec99_6e082117dd05487e959336b958f7764d.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_off0000554e.bin
4e37fa0eafb900771d9cdd347d43f5dc2a010749d24c6531b250634d29f5e27f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x554E 4908 bytes
font_01_sfnt_off0000660a.bin
e5585194c5f06a2623804b14837115d74dec7c3bdbd541ceadc500c710f1eafc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x660A 9876 bytes

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