Malicious PDF — malware analysis report

Static analysis result for SHA-256 438322559d8ad6c3…

MALICIOUS

PDF

42.0 KB Created: 2020-08-08 05:35:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44769a621b8a09bb5e2bfe8ea2025278 SHA-1: e05f59fe1ce110dbde3f1ac3d34879ff23de228c SHA-256: 438322559d8ad6c371924f2f41f4a97212b98466466754eda228adffb6a1e378
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing indicating a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=latex+article+example+pdf'. Another critical heuristic identified a PDF link farm, suggesting the document is part of a larger SEO manipulation effort to distribute malicious content. The document body, though heavily obfuscated, contains references to the redirector URL and other Shopify-hosted PDF files, reinforcing the lure.

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=latex+article+example+pdf
    • http://files.gatewaybehaviour.com/uploads/1/3/0/9/130969971/3895c1f5de83e8b.pdf
    • http://files.sustainablefuturessocietylse.com/uploads/1/3/2/8/132815015/a8f287.pdf
    • http://files.rfsmithecology.com/uploads/1/3/0/7/130775840/334951.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92835403356.pdf
    • https://cdn.shopify.com/s/files/1/0429/3532/0735/files/kobexiwibokogo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kamunikizesow.pdf
    • https://cdn.shopify.com/s/files/1/0430/5181/0969/files/rozagexop.pdf
    • https://cdn.shopify.com/s/files/1/0435/8681/4109/files/nupifemexuso.pdf
    • https://cdn.shopify.com/s/files/1/0434/7304/3622/files/16789779761.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mufowotipopugisafe.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/chopped_and_skrewed_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0610/files/wuladufexok.pdf
    • https://cdn.shopify.com/s/files/1/0443/8222/4550/files/espon_stylus_cx8400.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_off0000638c.bin
62c826a19007cb980f351c362b9a23f8f115b99b7cf70fd9aacdbf7bce1757b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x638C 5132 bytes
font_01_sfnt_off000074fb.bin
a3e841d7f492dad3ac7d89ba666da1b2a181f294d6ae223e17d4ee454c36ce1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74FB 11188 bytes

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