Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ca30df2025cce7a…

MALICIOUS

PDF

34.7 KB Created: 2020-10-15 06:45:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1dd5c4dbb570d2a370b4a627d16ff39 SHA-1: 2085ee2e4fee259b7e116e0dfa9020f0185f3766 SHA-256: 5ca30df2025cce7a8837f1008413d2b9117fc883dc5d71294914654a033405dd
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic designed to lure users to malicious infrastructure. The document body itself is heavily obfuscated and contains the malicious URL, indicating an attempt to disguise its true purpose. No scripts were extracted, but the presence of the malicious redirector and the link farm strategy are strong indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://cctraff.ru/strik?keyword=medicinal+uses+of+khaya+senegalensis+pdf
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/linisimiwovane_mewomajudam_nojupogifuvuxef.pdf
    • https://migirebunimalab.weebly.com/uploads/1/3/1/3/131383914/2271262.pdf
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/8e42bfb8d1b0f.pdf
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/9653445.pdf
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/zanadutut_wexudafenatogun_jetomefoja.pdf
    • https://cdn-cms.f-static.net/uploads/4366366/normal_5f873837835e2.pdf
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f87561aee302.pdf
    • https://cdn-cms.f-static.net/uploads/4367944/normal_5f87864ed3675.pdf
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f874edb7378a.pdf
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f87709134e42.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/18ad995.pdf
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/40ddfa4d7f4e3e.pdf
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/sefaritonos-nukivafeka-retisebop-regaxumex.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/sidobojugonuxexoz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6153/5132/files/stalins_totalitarian_state_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0493/2360/6175/files/jarelasaremubegu.pdf
    • https://cdn.shopify.com/s/files/1/0479/6658/4988/files/48_laws_of_power_audio_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/2011/4331/files/sample_notice_of_removal_to_federal_court_diversity.pdf
    • https://cdn.shopify.com/s/files/1/0441/2204/6616/files/the_jack_benny_program_season_1.pdf
    • https://cdn.shopify.com/s/files/1/0435/3540/1112/files/christian_family_adoptions_clackamas_or.pdf
    • https://cdn.shopify.com/s/files/1/0434/4394/5622/files/69103336573.pdf
    • https://cdn.shopify.com/s/files/1/0501/0692/5221/files/magic_compressor.pdf
    • https://uploads.strikinglycdn.com/files/1584ae8a-a29c-435f-8b32-5b2252419bba/25812400518.pdf
    • https://uploads.strikinglycdn.com/files/955025d3-b1a8-495b-bb5f-e49d73b00678/14382000529.pdf
    • https://uploads.strikinglycdn.com/files/18e59b78-1879-4a70-a5f4-e520eb163c8a/64526476184.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fee.bin
ae655022bc40d96d83d225aa980eb3f2ec671ec1b1f2d2ca8f407aefae312d7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEE 5492 bytes

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