Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f30168bb34b7fa6…

MALICIOUS

PDF

40.8 KB Created: 2020-08-09 01:43:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d57c3753ea0bcca0d8f9bf0cd12f345 SHA-1: a7541e2a610312374d0fcdb2a6afb1fe9eba53f5 SHA-256: 9f30168bb34b7fa6da29960da01089913b95f69f352d8025a8a180125fbf5fc8
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. The primary malicious link identified, 'https://ttraff.com/pify?keyword=algorithmic+state+machine+pdf', suggests a redirection to potentially harmful content. The ML classifier also strongly indicated maliciousness. The document body itself is heavily obfuscated and contains metadata related to its creation, but the primary threat appears to be the extensive link farm designed to lure users to malicious sites.

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=algorithmic+state+machine+pdf
    • http://files.drjuliannavalearningacademy.com/uploads/1/3/0/8/130814935/mebavumubawal.pdf
    • http://files.springhillmn.com/uploads/1/3/0/8/130874422/7995154.pdf
    • http://files.wormfoodforthough.net/uploads/1/3/0/9/130969243/e9c22e71c4f8.pdf
    • http://files.aramgershuni.com/uploads/1/3/1/3/131379894/a01dd8731a.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/pomiritakelebotodirepexos.pdf
    • https://cdn.shopify.com/s/files/1/0433/8722/4213/files/ubuntu_not_enough_free_disk_space.pdf
    • https://cdn.shopify.com/s/files/1/0438/3830/8512/files/aspects_of_growth_and_development.pdf
    • https://cdn.shopify.com/s/files/1/0431/1685/5457/files/kujozikomifag.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/megomububoramiwuxi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6383/5814/files/tularosusonibesofatepos.pdf
    • https://cdn.shopify.com/s/files/1/0430/9037/8903/files/8762121989.pdf
    • https://cdn.shopify.com/s/files/1/0436/3111/6448/files/8594308491.pdf
    • https://cdn.shopify.com/s/files/1/0435/1583/8618/files/11919190626.pdf
    • https://cdn.shopify.com/s/files/1/0436/9648/8613/files/tagimubafujolij.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_off00006240.bin
73137ff0d9fc3cfcfd0592ad8b0768504a3e6f605498fd4a02be834b440c739f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6240 5556 bytes
font_01_sfnt_off00007500.bin
3f7502e14423483ea677882206a001c3fab6ed1a7844095d67eb6c54bccd1449		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7500 9768 bytes

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