Malicious PDF — malware analysis report

Static analysis result for SHA-256 89a3c407f62f3a6e…

MALICIOUS

PDF

46.1 KB Created: 2020-08-17 17:33:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b39b8c3ecc1a81a9d9d993ad1bfe9097 SHA-1: 670ed283da4e5529d320052a3274927de0184b3f SHA-256: 89a3c407f62f3a6eef3b5ba00be02c02a8bac0b1c2a7948b0c811f104b882aeb
150 Risk Score

Malware Insights

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

The PDF document contains a clear lure related to 'offline android games with controller support' and embeds a link to a known malicious redirector. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms this, and the PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many hosted on Shopify, likely to obscure the malicious redirector. The ML_NYX_PDF_MALICIOUS classifier also strongly flagged this document.

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=offline+android+games+with+controller+support
    • http://vuwoz.wildflowerlab.com/uploads/1/3/1/4/131483068/1385154.pdf
    • https://cdn.shopify.com/s/files/1/0432/8131/8056/files/vozikenaninegigeme.pdf
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/88383494722.pdf
    • https://cdn.shopify.com/s/files/1/0435/2393/2311/files/wutekaxikapumetoginuxefe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zukukujumifuxutage.pdf
    • https://cdn.shopify.com/s/files/1/0428/8669/3023/files/jatakilegisoredowinivodi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4842/6902/files/9758768881.pdf
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/35675967442.pdf
    • https://cdn.shopify.com/s/files/1/0440/8301/9941/files/dijobe.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_off00005e95.bin
2c18eefc2025ee20e4f900cbbc72e0c70e2382cc0ccece0f30bc1ac716faa7c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E95 5688 bytes
font_01_sfnt_off000071d6.bin
2fd1afca0ed7043c7499df03aec7a015ca9c63ffc79cde316e20f31f81ee0851		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71D6 10312 bytes
font_02_sfnt_off00009550.bin
95a035bd0569bc30768e82a0d74c86b9b366f627756677ca54f14539840119c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9550 16408 bytes

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