Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaaa63f4ef5c0a15…

MALICIOUS

PDF

42.1 KB Created: 2020-08-12 03:30:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ee879e7d57422927cf13259ec3a9034 SHA-1: 496bcf83dd9e66a78a739b3afbfa631b06b00174 SHA-256: eaaa63f4ef5c0a15ff2a1baf256f7f29937fd3dda5f7db3b146e7f74d512cc09
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as sheet music. The ML classifier strongly indicates maliciousness. The primary IOC is the redirector URL, which is designed to lead users to further 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.com/pify?keyword=bwv+974+sheet+music+pdf
    • http://files.shearserenitysalon.net/uploads/1/3/1/3/131379759/8772874.pdf
    • http://files.miniopener.com/uploads/1/3/1/3/131380547/7519516.pdf
    • http://files.armenianstudentconvention.ca/uploads/1/3/0/8/130874189/7463231.pdf
    • http://files.istroumahigh.org/uploads/1/3/1/3/131382239/747046.pdf
    • https://cdn.shopify.com/s/files/1/0433/4590/3781/files/roruxakuzoxukikiwisidosu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0668/0484/files/61063315492.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0767/files/merrill_lynch_research.pdf
    • https://cdn.shopify.com/s/files/1/0429/3217/5014/files/bypass_gstrico_en_y_de_roux.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5576/files/autocad_exportar_3d.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3365514284.pdf
    • https://cdn.shopify.com/s/files/1/0432/7030/7995/files/34499314056.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3082/files/25263631550.pdf
    • https://cdn.shopify.com/s/files/1/0434/6901/3157/files/pazazebivatulawe.pdf
    • https://cdn.shopify.com/s/files/1/0432/0106/9220/files/jaxunu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4655/2227/files/18650430856.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005066.bin
9934be0d4c0a6c23cd99c2149f2c9dd6f89f39513ff9b1922f7883876b1cbe09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5066 5584 bytes
font_01_sfnt_off00006372.bin
f66befb70139dbf70c68f79e46c59ae0a12d1f824b7e704fbf9ad2b20cb1aa72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6372 10096 bytes
font_02_sfnt_off00008633.bin
b2ca9dfbe8f46023a3a9e333741d05f311bccdfc9b8d5eafbc10be52c56fc21c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8633 16164 bytes

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