Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c7fc61c5d8ff8c7…

MALICIOUS

PDF

62.6 KB Created: 2020-08-04 21:43:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6462fc0f0180fbf17218ffb2db8ad14 SHA-1: a1cff00c3eccee647cd0da91018fecf89ffe337a SHA-256: 1c7fc61c5d8ff8c7eb52125ef7b9385fdffced6320abc131addbd15d086a6b43
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. The document body, though heavily obfuscated, contains text related to 'health psychology' and the malicious URL. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are benign Shopify links, but the primary redirector is malicious. The ML classifier strongly indicates maliciousness.

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=health+psychology+understanding+the+mind+body+connection+pdf
    • http://files.heyletsgetaway.com/uploads/1/3/0/8/130874115/0675d836bf.pdf
    • http://files.pemmensgolf.net/uploads/1/3/1/3/131379612/febokibilodirina.pdf
    • http://files.nicolehesslink.com/uploads/1/3/1/4/131437669/36775168452.pdf
    • http://files.readtransformmedia.com/uploads/1/3/1/4/131438234/tuxinevenufiru.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ruxejuvekega.pdf
    • https://cdn.shopify.com/s/files/1/0440/9065/4885/files/vasarafogupaxufat.pdf
    • https://cdn.shopify.com/s/files/1/0429/6045/3791/files/90166312804.pdf
    • https://cdn.shopify.com/s/files/1/0429/5580/0732/files/57025189495.pdf
    • https://cdn.shopify.com/s/files/1/0435/6761/2063/files/standard_height_and_weight_chart_for_male_and_female.pdf
    • https://cdn.shopify.com/s/files/1/0437/6382/6849/files/11995044156.pdf
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/guxavimosopij.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/vafawubu.pdf
    • https://cdn.shopify.com/s/files/1/0439/8442/1022/files/famamamakozo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5401/3336/files/bawofogizurezinit.pdf
    • https://cdn.shopify.com/s/files/1/0432/2240/1192/files/71360711543.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_off0000b712.bin
fc7bb3fd222877072070b5b74cc9e295345c489072750e0c389f5c70dd42be9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB712 5772 bytes
font_01_sfnt_off0000ca8b.bin
71db82584581c1bb0489880cb033022f7b9480f054e0a0ec273b4828a5d3edab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8B 10020 bytes

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