Malicious PDF — malware analysis report

Static analysis result for SHA-256 d528765c0584e0b4…

MALICIOUS

PDF

40.8 KB Created: 2020-08-24 14:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e8a2cbbe4fd495e1dfd1cf9f710708b SHA-1: acb88f97075e1ed7b3bc4579655d15d87ac56269 SHA-256: d528765c0584e0b45bfc9091ffec94d70cbcf1e1fbb33ed4b984d446b42299e9
150 Risk Score

Malware Insights

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

The PDF contains a lure promising free access to 'Battlefield 3 free with multiplayer' to entice users to click a link. This link, 'https://ttraff.com/pify?keyword=battlefield+3+free++with+multiplayer', is identified as a malicious redirector. The document also functions as a link farm, embedding numerous other PDF links, likely for SEO manipulation or to spread malicious content. No scripts were extracted, but the primary malicious behavior is the redirection via the embedded link.

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=battlefield+3+free++with+multiplayer
    • http://files.claireaziza.com/uploads/1/3/1/8/131871462/ac63184b.pdf
    • http://files.clevelandburlesque.com/uploads/1/3/1/4/131409024/47002d95.pdf
    • https://cdn.shopify.com/s/files/1/0432/0785/2192/files/17024241295.pdf
    • https://cdn.shopify.com/s/files/1/0463/8084/3163/files/apastamba_dharma_sutra.pdf
    • https://cdn.shopify.com/s/files/1/0437/6975/7850/files/46497290778.pdf
    • https://cdn.shopify.com/s/files/1/0435/5204/7255/files/77230935902.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44603331863.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23342697578.pdf
    • https://cdn.shopify.com/s/files/1/0434/7949/8918/files/mibiwarusabezujasifawuku.pdf
    • https://cdn.shopify.com/s/files/1/0437/6051/7274/files/19502150091.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/depogozef.pdf
    • https://cdn.shopify.com/s/files/1/0447/4650/6391/files/veterinary_anatomy_coloring_book_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/80213385858.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gomejalubewetilukifij.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_off00005e27.bin
f74940241d6b4378ae95f89625292c891e033c2095ead37500098d8cdeb1920a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E27 5508 bytes
font_01_sfnt_off000070d9.bin
4424aab8f8bc2550781057368fc740c254a720114426a153855daab4f8a5ddb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70D9 10480 bytes

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