Malicious PDF — malware analysis report

Static analysis result for SHA-256 b65d9db93bd629e4…

MALICIOUS

PDF

52.8 KB Created: 2020-08-19 22:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ddd308720285ee8211cfc7fe07c6d31 SHA-1: 8a1929b2bbae3aedae9bd831b94f21a0ee8696f7 SHA-256: b65d9db93bd629e4442777732235272ce569aba244a2c5dc75b7bc20b9ae088f
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains the same suspicious URL, reinforcing its role in the attack. 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.com/pify?keyword=business+information+technology+l%25C3%25A0+g%25C3%25AC
    • http://files.thedaimlerxjcollection.com/uploads/1/3/1/6/131637224/2086362.pdf
    • http://files.breakthroughtc.com/uploads/1/3/1/4/131412235/nafopesekelov.pdf
    • http://zobas.tarahanish.com/uploads/1/3/0/7/130740206/0e63798e670.pdf
    • http://toluj.westkootenaysuicideprevention.com/uploads/1/3/1/6/131606490/1355e27f7eb.pdf
    • http://files.gengrouprestaurants.com/uploads/1/3/1/4/131438216/menozenaromin.pdf
    • https://cdn.shopify.com/s/files/1/0431/4857/4884/files/29052609520.pdf
    • https://cdn.shopify.com/s/files/1/0435/4582/1333/files/98604535062.pdf
    • https://cdn.shopify.com/s/files/1/0438/0708/0605/files/57700046399.pdf
    • https://cdn.shopify.com/s/files/1/0429/0933/5715/files/towuxegawozamapudaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/2090/9735/files/wopawix.pdf
    • https://cdn.shopify.com/s/files/1/0432/4704/2715/files/nazozak.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/mitobujibanexemapofuko.pdf
    • https://cdn.shopify.com/s/files/1/0430/4456/9242/files/rabujo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/lejuzejasazopan.pdf
    • https://cdn.shopify.com/s/files/1/0445/5196/2783/files/akon_songs_free_all.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_off00008d95.bin
4ca4021c11b857ffd34cf67549dde4359a4fc3168961fe8c141cddb8e466c5df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D95 5736 bytes
font_01_sfnt_off0000a063.bin
5e9d84a60d8e5d0c1aaa9b4fb2ad8cbc0b69bd0bcc376ed8c4fdd61817b15512		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA063 10416 bytes

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