Malicious PDF — malware analysis report

Static analysis result for SHA-256 b48dc0f5d6b1abb9…

MALICIOUS

PDF

74.3 KB Created: 2020-08-10 14:23:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfa1194c5f63ebd480fecff9d43bdcb3 SHA-1: 2d04405098603bfe427732a4afad17c755f9bd26 SHA-256: b48dc0f5d6b1abb9d6930db18bc2f79f4245542078daee8ec086f376a7968521
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector. This suggests a phishing or redirection attack aimed at leading the user to 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.ru/pify?keyword=atharva+veda+in+telugu+pdf
    • http://files.matimba.com/uploads/1/3/1/0/131070212/7e35f.pdf
    • http://files.bradswoodworking.com/uploads/1/3/0/7/130739247/wakinilakukigifugas.pdf
    • http://files.tarpanmanagers.com/uploads/1/3/0/8/130874124/4176531.pdf
    • https://cdn.shopify.com/s/files/1/0431/0476/4068/files/dopivolewosurofinosinozap.pdf
    • https://cdn.shopify.com/s/files/1/0429/2214/8003/files/wii_operation_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/tatap.pdf
    • https://cdn.shopify.com/s/files/1/0428/6873/6166/files/38228019414.pdf
    • https://cdn.shopify.com/s/files/1/0429/0769/7305/files/83109796521.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/voxabelilix.pdf
    • https://cdn.shopify.com/s/files/1/0428/7728/8611/files/budgeting_and_forecasting_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0431/0587/8173/files/cambio_climatico_en_mexico_2020.pdf
    • https://cdn.shopify.com/s/files/1/0427/6686/0455/files/86326379598.pdf
    • https://cdn.shopify.com/s/files/1/0433/6202/5624/files/metabolismo_de_la_bilirrubina_pediatria.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/kigidajowarinodojex.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf3b.bin
846f6b6c65276146b835df7029189450e31a67f5ff0b305de9833f0576c57792		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF3B 5172 bytes
font_01_sfnt_off0000d0d4.bin
36d144b1553f5557ffbe46ec0d933b44bc74b306aad1930491fab4244bb0e8ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D4 7372 bytes
font_02_sfnt_off0000e76b.bin
b6edf89385f9ca629a5c9a05da0598b71656b6200721471ce4249bf251e96d3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE76B 11604 bytes
font_03_sfnt_off00010c73.bin
88d6ba090c2de92f3be8d032ea93eee52a5d619d854fad13ac2a7db649db89bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C73 3584 bytes

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