Malicious PDF — malware analysis report

Static analysis result for SHA-256 27df8a541b84b365…

MALICIOUS

PDF

45.0 KB Created: 2020-08-09 07:26:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06564c9926b528db11cfa1d404303c52 SHA-1: f58139fa0daad7420d637cd2541f0abae517a3d9 SHA-256: 27df8a541b84b365a0fb7560f9d9dcbfad9a6dfd4c0a5d84896ca1422d90a767
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Luggage security system mini project pdf' and the authoring application 'wkhtmltopdf', suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy. The ML classifier also strongly flagged this PDF as malicious.

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=luggage+security+system+mini+project+pdf
    • http://files.levitytherapeutics.com/uploads/1/3/0/7/130740051/kulazuduwiximifad.pdf
    • http://files.wisewomanliving.net/uploads/1/3/1/4/131407361/puruzexixorike.pdf
    • http://files.orenpizmonylevy.com/uploads/1/3/0/7/130739308/jenoramuvijera.pdf
    • https://cdn.shopify.com/s/files/1/0435/1878/7743/files/siwoxowuvegigugate.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65105912314.pdf
    • https://cdn.shopify.com/s/files/1/0435/7393/6291/files/54143020673.pdf
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/kanizovapabozizoramig.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/rarajinupatejinowadegof.pdf
    • https://cdn.shopify.com/s/files/1/0435/2914/2426/files/panel_data_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0439/0689/1931/files/effects_of_globalization.pdf
    • https://cdn.shopify.com/s/files/1/0431/9802/1793/files/methods_of_waste_disposal_in_nigeria.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7875/files/fosawojojuzamedarumarat.pdf
    • https://cdn.shopify.com/s/files/1/0445/9554/4228/files/cengage_calculus_maths_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8222/7617/files/42039165951.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_off00007122.bin
496f4cd3e8499d65cd4b5cd5aa5d33ed202c83d0cc1d68a0f444e22fba23a603		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7122 5560 bytes
font_01_sfnt_off0000840d.bin
a27dcb5cf475f48c0d4bb58987a9aab40b77e9128bd352fb2bea7363362ce48b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x840D 10076 bytes

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