Malicious PDF — malware analysis report

Static analysis result for SHA-256 582db9fe0a9c6e3e…

MALICIOUS

PDF

33.3 KB Created: 2020-08-02 07:59:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a15d279304dffb3c0567c1d841902ed4 SHA-1: be43881b493f42ed63e6a194d3c32a6501838a2d SHA-256: 582db9fe0a9c6e3ea162c62faeb0c602801a131ce72ae1dfcb2442511b1454e0
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The primary malicious link is https://ttraff.cc/pify?keyword=ryan+aerator+parts, which likely leads to a phishing or malware download site. The document body, though heavily obfuscated, contains references to this URL and other PDF files hosted on various domains, suggesting a coordinated effort to distribute malicious content.

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=ryan+aerator+parts
    • http://files.onekerato.com/uploads/1/3/2/6/132681544/vukibekojo-wagerotodeve.pdf
    • http://files.janedelafordtaylor.com/uploads/1/3/2/7/132710763/satixekuzukinak.pdf
    • http://files.pugetsounddoulas.com/uploads/1/3/0/7/130775063/2af254630e853.pdf
    • http://files.batonrougehomeinspector.org/uploads/1/3/2/7/132710748/303e4523420a870.pdf
    • https://cdn.shopify.com/s/files/1/0434/1530/6405/files/zamikafi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6224/8102/files/45926563552.pdf
    • https://cdn.shopify.com/s/files/1/0435/4726/3131/files/diveku.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/88557725508.pdf
    • https://cdn.shopify.com/s/files/1/0432/0015/1707/files/mevugubeni.pdf
    • https://cdn.shopify.com/s/files/1/0427/6859/7158/files/28084222740.pdf
    • https://cdn.shopify.com/s/files/1/0433/4324/9563/files/51507443969.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/72931498865.pdf
    • https://cdn.shopify.com/s/files/1/0429/4007/2092/files/70970545911.pdf
    • https://cdn.shopify.com/s/files/1/0431/4988/5606/files/31061604407.pdf
    • https://cdn.shopify.com/s/files/1/0429/6101/0842/files/29620350858.pdf
    • https://cdn.shopify.com/s/files/1/0430/0177/4233/files/27504019303.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/11719062166.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_off000046e7.bin
50faee4408b45c5fe700b709346c3c52e574cdb6347298909c9b7abb19c304ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46E7 4888 bytes
font_01_sfnt_off000057a3.bin
e1f96018840cc57a0a6fc37953b99c946305d878c81a85feae09185c0c3a5b86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57A3 9636 bytes

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