Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9d060560d655d3a…

MALICIOUS

PDF

59.9 KB Created: 2020-08-05 14:38:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdc434faa93b968748813947a417be88 SHA-1: 1a65d499e2bdd10c21d247d9a1559a94254047e6 SHA-256: f9d060560d655d3a5bc2a201eb7468482dfeaf60354e4bcb3dd323c5061525fe
150 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a link farm hosted on cdn.shopify.com, designed to appear as legitimate content. One critical heuristic identified a link to a known malicious redirector infrastructure at ttraff.ru. The document body, though heavily obfuscated, contains the same URL as the malicious redirector, suggesting an attempt to disguise malicious activity as a legitimate document. 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=aircraft+design+process+pdf
    • http://files.cactusmoonshine.com/uploads/1/3/2/6/132681409/e3852ebc1.pdf
    • http://files.flyrgfa.com/uploads/1/3/0/9/130968993/ruwowuru.pdf
    • http://files.misssandyssandbox.com/uploads/1/3/0/8/130874652/3021130.pdf
    • http://files.colesamazingart.com/uploads/1/3/1/4/131438847/sujadufuxew.pdf
    • http://files.edwardjdenecke.com/uploads/1/3/1/4/131453132/570ab.pdf
    • https://cdn.shopify.com/s/files/1/0433/6628/5480/files/35352358837.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7671/files/13847290282.pdf
    • https://cdn.shopify.com/s/files/1/0438/4315/8166/files/kunajekunobefamubela.pdf
    • https://cdn.shopify.com/s/files/1/0429/0609/1687/files/nosex.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1783/files/biochemical_analysis_of_honey.pdf
    • https://cdn.shopify.com/s/files/1/0429/5199/9637/files/vifev.pdf
    • https://cdn.shopify.com/s/files/1/0429/9377/8837/files/wanekilipevak.pdf
    • https://cdn.shopify.com/s/files/1/0437/2732/3301/files/38968823725.pdf
    • https://cdn.shopify.com/s/files/1/0430/5757/8138/files/46108247821.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1549/files/lumivagonubuwadi.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_off0000a2b9.bin
80b9075e351920e8688f9ec2cccf4b2516c93cd703ca23313c7c5be9a3c9fa9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2B9 5280 bytes
font_01_sfnt_off0000b4c5.bin
716ff653b5cd585928018b9a3a66bcd3d363eff99ab1e517d59de919c2c85f5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4C5 14540 bytes

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