Malicious PDF — malware analysis report

Static analysis result for SHA-256 c00a430e49336ff8…

MALICIOUS

PDF

49.4 KB Created: 2020-08-05 00:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b05a62586cbcfe4279b07dbca103881 SHA-1: 44b111b0790685a397e3c93ce6ace7ca0b48a827 SHA-256: c00a430e49336ff8b8265b16634648341fa744fe9c00d367620ac8c9fe9e0fd7
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to a known malicious redirector at 'https://ttraff.ru/pify?keyword=anchor+tag+in+html+with+example+pdf'. The document body itself is heavily obfuscated but contains references to this URL and numerous other PDF files hosted on various domains, suggesting a link farm or redirection scheme designed to lead users to malicious content. No scripts were extracted from this sample.

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=anchor+tag+in+html+with+example+pdf
    • http://files.holdingupthesky.org/uploads/1/3/1/4/131453248/8414162.pdf
    • http://files.mskhor.com/uploads/1/3/0/8/130874416/rurazuxor.pdf
    • http://files.mariecharpentier.net/uploads/1/3/1/4/131483019/batipaxadas.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7870/files/64599918950.pdf
    • https://cdn.shopify.com/s/files/1/0431/8711/0037/files/16116930843.pdf
    • https://cdn.shopify.com/s/files/1/0434/3817/8470/files/31078388900.pdf
    • https://cdn.shopify.com/s/files/1/0439/6577/6030/files/18276836509.pdf
    • https://cdn.shopify.com/s/files/1/0432/0755/7275/files/zobodakaviboxanisi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7197/9172/files/tolepasisito.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/84352485314.pdf
    • https://cdn.shopify.com/s/files/1/0431/4382/3511/files/40251017433.pdf
    • https://cdn.shopify.com/s/files/1/0438/5266/0901/files/5546615440.pdf
    • https://cdn.shopify.com/s/files/1/0437/1536/2984/files/durofixun.pdf
    • https://cdn.shopify.com/s/files/1/0430/0144/6554/files/14903061321.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_off0000795a.bin
d6193328d4172a6aa70357a43f218571b76db421f66a3d6544d8e398e6f2a9f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x795A 5540 bytes
font_01_sfnt_off00008c22.bin
0bac0fbcd07ec0f0cad8e82bd1af6c6e976dd324d5712dd3cd7e6ea41e367be2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C22 14308 bytes

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