Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcd82d1740c31bc9…

MALICIOUS

PDF

44.6 KB Created: 2020-08-10 14:37:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 002f4a96dcd375971a8b1a88d652c6aa SHA-1: 59f07ed67d75d58cc941c76a52807d91a714e932 SHA-256: fcd82d1740c31bc9ccba9267b809510f40c1d33e09eb044bb9e6f5715daa48a0
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=agora+resumen+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which are to benign Shopify domains but likely serve to obscure the malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, reinforcing the lure.

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.ru/pify?keyword=agora+resumen+pdf
    • http://files.lambdalambdasigma.org/uploads/1/3/0/8/130813428/65629a9c1bde.pdf
    • http://files.thepartystoremt.com/uploads/1/3/1/1/131163832/sopiwegu.pdf
    • http://files.fnaq.org/uploads/1/3/0/9/130969944/nivubuluro.pdf
    • http://files.sandromontefusco.com/uploads/1/3/2/6/132681887/1ae1aa457cf96.pdf
    • http://files.moliereexpressions.com/uploads/1/3/1/0/131070633/fufinefojukubotejovi.pdf
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/naming_inorganic_compounds.pdf
    • https://cdn.shopify.com/s/files/1/0437/9446/4929/files/55472781540.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/35022180152.pdf
    • https://cdn.shopify.com/s/files/1/0430/9218/1153/files/timifabeleposigi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1190/7488/files/self_healing_concrete_bacteria.pdf
    • https://cdn.shopify.com/s/files/1/0429/8211/3433/files/vazonotojutudaxopajaxowa.pdf
    • https://cdn.shopify.com/s/files/1/0435/8311/1323/files/52335462725.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bumagigefabap.pdf
    • https://cdn.shopify.com/s/files/1/0432/0316/6370/files/kebozafurozadibifep.pdf
    • https://cdn.shopify.com/s/files/1/0427/8065/5775/files/kowadifegasor.pdf
    • https://cdn.shopify.com/s/files/1/0434/8909/9942/files/kiwozazozosilol.pdf
    • https://cdn.shopify.com/s/files/1/0428/7735/4143/files/69356826380.pdf
    • https://cdn.shopify.com/s/files/1/0434/3224/7457/files/john_deere_750_tractor_manual.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/
    • https://cdn.shopify.com/s/files/1/0

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064c2.bin
d6b35dac76eed95299f14dc37c6f0a925e3f4d4a31c239c521ad5391e1855572		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64C2 5072 bytes
font_01_sfnt_off000075d9.bin
3f727a0426d552904869ea2331077ac6a8514f53ef4d2e51994c9a840783b68e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75D9 9924 bytes
font_02_sfnt_off000097c1.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97C1 4324 bytes

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