Malicious PDF — malware analysis report

Static analysis result for SHA-256 3267a0dfb59803dd…

MALICIOUS

PDF

42.8 KB Created: 2020-07-29 09:19:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ed17b7d7f8f9d62aaece14f5d577e3c SHA-1: 774ac398259b4f27de7692d3ae74d75687a0b227 SHA-256: 3267a0dfb59803ddd61b627d05e49108b15fbe707b4e665a23fb4a6c10d8d5c3
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious due to a high number of embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Stylish chair pics', suggesting a lure. The presence of numerous links, including a 'link farm', indicates an attempt to distribute malicious content or phish users.

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.cc/pify?keyword=stylish+chair+pics
    • http://files.crushsocceracademy.com/uploads/1/3/1/8/131856632/dopovajekinugizoso.pdf
    • http://files.helenemillscenter.org/uploads/1/3/0/7/130776580/jekerofonet-soxogotijasa-nezovasixulatu.pdf
    • http://files.michaelpoznansky.com/uploads/1/3/0/7/130775998/54684aa35.pdf
    • https://cdn.shopify.com/s/files/1/0430/4168/5665/files/5869629893.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96280370261.pdf
    • https://cdn.shopify.com/s/files/1/0429/2644/0607/files/fixumotalakas.pdf
    • https://cdn.shopify.com/s/files/1/0437/3161/5909/files/29527669064.pdf
    • https://cdn.shopify.com/s/files/1/0433/6015/7855/files/gusutamatalediparena.pdf
    • https://cdn.shopify.com/s/files/1/0434/0200/2584/files/6920847556.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/79776883495.pdf
    • https://cdn.shopify.com/s/files/1/0435/5214/5560/files/92394938535.pdf
    • https://cdn.shopify.com/s/files/1/0432/0624/6557/files/98080262094.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34803766861.pdf
    • https://cdn.shopify.com/s/files/1/0429/2739/0887/files/tuzadavaxekekerav.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/1/0433/6015/7855/files/gusutamataledip

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b1f.bin
7b0b2c1a6fd7afa0c3fdea9994e6229feedc6d33ab535895b3795a465241c2b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1F 4680 bytes
font_01_sfnt_off00007b09.bin
307ac201feb617f3be86b96afa2366d6f4204d18f0dc95c0ab5b2aa155cf0bf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B09 10180 bytes

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