Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8cbc4dc989719ff…

MALICIOUS

PDF

44.3 KB Created: 2020-07-31 18:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 955d6f37a022b0a01305e56c1f4821e3 SHA-1: 9d122291370f2772aca8caf57ac6a694a6efbdaf SHA-256: d8cbc4dc989719ffaeed1d26913d8a5f16fa203650a43a3bee3384dbdf9d274f
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure for 'Pokemon silver guide pdf', suggesting a social engineering pretext. The presence of multiple Shopify URLs, some confirmed benign and others unknown, indicates a link farm strategy, likely to obscure the malicious redirector.

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=pokemon+silver+guide+pdf
    • http://files.explorestanton.com/uploads/1/3/1/4/131453216/6741733.pdf
    • http://files.rubbosaltshop.com/uploads/1/3/2/6/132682585/jetafajedidodid_bevidotedajeki_nalisitaw_tekajelejezul.pdf
    • http://files.siblingarts.net/uploads/1/3/1/3/131382590/9606010.pdf
    • http://files.victoriarefinishing.com/uploads/1/3/2/7/132740978/bbfac67.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/xebonivedob.pdf
    • https://cdn.shopify.com/s/files/1/0437/8486/3893/files/16526608555.pdf
    • https://cdn.shopify.com/s/files/1/0439/3120/5787/files/accounting_information_system_lecture_notes_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0431/6597/4690/files/84061371955.pdf
    • https://cdn.shopify.com/s/files/1/0431/6862/8892/files/wowagosubeb.pdf
    • https://cdn.shopify.com/s/files/1/0437/6385/9610/files/vuzaviminubagobi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1651/0873/files/bagezujibulonot.pdf
    • https://cdn.shopify.com/s/files/1/0434/6560/5286/files/p90x2_fitness_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/nebopaxojosagabaful.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/2931617258.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_off00006f5c.bin
b857b99b4c9eaea3e43e95c12a751998deef580686e5f4922af39e64cae4d359		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5C 5276 bytes
font_01_sfnt_off0000814b.bin
c5b881b84e1e977205a192d607a2ad58577945599e968a0f4994793525e35559		 pdf-font-stream PDF embedded font (sfnt) at offset 0x814B 10420 bytes

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