Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccef4c8cc8526037…

MALICIOUS

PDF

54.0 KB Created: 2020-08-06 21:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b44ae102510bb7dd9accd1c5c6d3ba26 SHA-1: f41201458be3ae6df90e4f925e95c75cd5783f38 SHA-256: ccef4c8cc852603785edf4dc4c29416f07d5ae468873635fdb97e1a219163d23
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 'https://ttraff.ru/pify?keyword=the+final+adventures+of+sherlock+holmes+pdf'. Additionally, it exhibits a PDF link farm behavior, with numerous links pointing to external PDFs, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body contains obfuscated text and the target URL, suggesting a lure to a malicious site.

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=the+final+adventures+of+sherlock+holmes+pdf
    • http://files.educatoralexander.com/uploads/1/3/0/7/130775050/noruwanesagutu-luseragazoxa-rabikatoja.pdf
    • http://files.handbuiltvans.com/uploads/1/3/0/9/130969681/tewepimaj_kiwomemam.pdf
    • http://files.mantasosguide.com/uploads/1/3/1/0/131070378/winorepotaxudaze.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/xufakivulo.pdf
    • https://cdn.shopify.com/s/files/1/0438/0714/6146/files/nawozonukaju.pdf
    • https://cdn.shopify.com/s/files/1/0434/8179/2664/files/17667582492.pdf
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/61421283929.pdf
    • https://cdn.shopify.com/s/files/1/0431/7967/1718/files/vizepisukaxe.pdf
    • https://cdn.shopify.com/s/files/1/0429/7850/8953/files/jujotifanosibifevexeku.pdf
    • https://cdn.shopify.com/s/files/1/0432/8990/3259/files/52225589292.pdf
    • https://cdn.shopify.com/s/files/1/0428/8780/7129/files/ledukipokekuxadipasogufi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2299/2028/files/zesowotekaga.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_off00009655.bin
bce97b0fc3d317d9de68f9a37deba46403f0b113117f255c07b4f9ef500528c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9655 5468 bytes
font_01_sfnt_off0000a8ce.bin
9ab0a7b189a4ba2028d605acd2f1e74b792b57613c3aaa6c70e61bfd955de9ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8CE 9944 bytes

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