Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf3f65e101d39845…

MALICIOUS

PDF

39.4 KB Created: 2020-08-08 07:27:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87e17eb67751d085eb2d641b6dc3d3ca SHA-1: 3e332126dd08690d12a4f448ffac147f94e6d779 SHA-256: bf3f65e101d398459b7f66be6157c14ed451b11dd4f2ef79e7c9d98103687879
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains a mass external link farm, with many links pointing to Shopify domains, likely for SEO manipulation. Crucially, one embedded link, presented as 'business management skills notes pdf', redirects to the malicious domain 'ttraff.com'. This indicates a social engineering tactic to trick users into visiting a potentially harmful site. No scripts were extracted, limiting the analysis of further malicious actions.

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=business+management+skills+notes+pdf
    • http://files.vinylspin.ca/uploads/1/3/0/9/130969148/2118972.pdf
    • http://files.jennifermclayton.com/uploads/1/3/2/6/132681928/7837438.pdf
    • http://files.cobbosseeconteesnowmobileclub.com/uploads/1/3/2/8/132815220/1321642.pdf
    • http://files.safelyride.com/uploads/1/3/2/7/132740415/wenesixedi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8518/5702/files/git_commit_message_example.pdf
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/63874978238.pdf
    • https://cdn.shopify.com/s/files/1/0430/9542/5191/files/add_subtract_decimals.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/14728013763.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/bioaccumulation_and_biomagnification.pdf
    • https://cdn.shopify.com/s/files/1/0440/2541/3782/files/mupowalijen.pdf
    • https://cdn.shopify.com/s/files/1/0432/8275/9836/files/sobipebalililumupo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8034/3967/files/2934351778.pdf
    • https://cdn.shopify.com/s/files/1/0437/8483/1125/files/dark_souls_3_wolf_knight_armor.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tekutuni.pdf
    • https://cdn.shopify.com/s/files/1/0445/5114/3588/files/reproduccion_del_reino_animal.pdf
    • https://cdn.shopify.com/s/files/1/0437/6113/9861/files/sanuvena.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_off00005d9f.bin
cd13a7e76df24f8773d0a3e600110c19dec52fa99eabe80ae5cda0e22e6117c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D9F 5376 bytes
font_01_sfnt_off00006fe3.bin
7d4f2d36f9220c855e26187b897eebe647feef7c2442618d512737cd9d6af5fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE3 9692 bytes

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