Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bbdb91cc433d44e…

MALICIOUS

PDF

52.0 KB Created: 2020-08-23 00:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afe4104e81d47d54519b58047e63f442 SHA-1: fe8a7194258db540c351601eecde269fea6bd733 SHA-256: 9bbdb91cc433d44e50331c6e0e6c86a77a1ddeffab1df73200776b94df341cb0
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'good food guide brisbane 2018' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly supports the malicious verdict.

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=good+food+guide+brisbane+2018
    • http://wusazewat.burryheights.com/uploads/1/3/0/8/130814297/domeves.pdf
    • http://files.marinmusicals.org/uploads/1/3/2/7/132710603/3652322.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/22650439267.pdf
    • https://cdn.shopify.com/s/files/1/0435/5063/8241/files/69079335411.pdf
    • https://cdn.shopify.com/s/files/1/0427/8393/2582/files/besebunuxudozase.pdf
    • https://cdn.shopify.com/s/files/1/0429/1257/9747/files/76190959402.pdf
    • https://cdn.shopify.com/s/files/1/0439/3651/4216/files/51631851210.pdf
    • https://cdn.shopify.com/s/files/1/0433/9495/7466/files/sivato.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/60514760606.pdf
    • https://cdn.shopify.com/s/files/1/0435/3287/7976/files/12404236973.pdf
    • https://cdn.shopify.com/s/files/1/0434/5469/3537/files/segetad.pdf
    • https://cdn.shopify.com/s/files/1/0431/9641/6157/files/74325757584.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/1/0428/9835/8432/files/2

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008a1d.bin
c2ab5916138caa84ee2d8a92180c22274fb7d9211040b780212a47a4c82d3e27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A1D 5732 bytes
font_01_sfnt_off00009db3.bin
67025daf45cc1fe5381aeeebb55f1c0b2596bdf6bad553462a37733f00231701		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DB3 11180 bytes

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