Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd0c41c036ed2e8b…

MALICIOUS

PDF

70.3 KB Created: 2020-08-13 22:23:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c42925b93ebcf9ba4a951f31eab504eb SHA-1: 3bd5d594eb584898459d8866f4a8cc2b8465223b SHA-256: dd0c41c036ed2e8b6ea80b6586614ed8cebd88d003385780e7e77c3b5e15d7f2
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains the malicious URL and references to a 'Jasper Jones movie study guide', suggesting a lure. The ML classifier strongly flags this PDF as malicious. No scripts were extracted from this sample.

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=jasper+jones+movie+study+guide
    • http://mubuvuro.harrisendofthetrailranch.com/uploads/1/3/0/9/130969060/milegarituzozumuga.pdf
    • http://files.natesessentialtraining.com/uploads/1/3/2/6/132695575/pamilubino.pdf
    • http://files.frankminnella.com/uploads/1/3/1/0/131071166/67acfef571.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/1867277933.pdf
    • https://cdn.shopify.com/s/files/1/0432/1342/2753/files/11138663543.pdf
    • https://cdn.shopify.com/s/files/1/0432/5919/9650/files/xesumadilefezigipe.pdf
    • https://cdn.shopify.com/s/files/1/0434/7330/5750/files/guruk.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/what_is_island_biogeography.pdf
    • https://cdn.shopify.com/s/files/1/0436/9842/1913/files/gekikivefumodowudori.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92835403356.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rerisorajomowuba.pdf
    • https://cdn.shopify.com/s/files/1/0428/9508/1625/files/aparato_respiratorio_histologia.pdf
    • https://cdn.shopify.com/s/files/1/0429/5108/2143/files/posenewavaluxedixa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c951.bin
98ea90afa6872e46ea7c7d918b002395bb8f5f0709d27b3a322d0bb3013b8ec5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC951 5356 bytes
font_01_sfnt_off0000db7f.bin
34176554985b5c8d7087d33d08a352fdc3b1585ec8cae740c831e28f67693acf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7F 10120 bytes
font_02_sfnt_off0000fe21.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE21 4324 bytes

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