Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c932d374ab6c9be…

MALICIOUS

PDF

43.9 KB Created: 2020-08-01 15:47:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7564bbf802771152cf9cdc51cff1f0a5 SHA-1: 7f151c02f4ba8edb6e0452a465bb3db99d1abc6e SHA-256: 8c932d374ab6c9beea00a5e0274cb9ffb4196939073a91aac0666db2f847fb20
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate academic resources, but the primary link redirects to a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the embedded URL https://ttraff.ru/pify?keyword=financial+accounting+weygandt+9th+edition+pdf is part of known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many hosted on cdn.shopify.com, suggesting an attempt to manipulate search engine results or distribute malicious content through seemingly benign links. The document body contains garbled text but includes the suspicious URL.

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=financial+accounting+weygandt+9th+edition+pdf
    • http://files.mksheatsteachingportfolio.com/uploads/1/3/0/7/130739490/64a0e5a89b178da.pdf
    • http://files.lifestyledetails.com/uploads/1/3/1/4/131482886/kudiwujifur-bepeder-pifegiwi.pdf
    • http://files.celestialstarsdance.com/uploads/1/3/1/4/131453588/jewatukiba.pdf
    • http://files.zenobirr.com/uploads/1/3/2/6/132682851/e8c85cc3500.pdf
    • https://cdn.shopify.com/s/files/1/0431/8747/0494/files/jilulezomu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6918/files/jawede.pdf
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/51353160255.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kitona.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/21772374199.pdf
    • https://cdn.shopify.com/s/files/1/0427/5562/1031/files/putonijigifitekil.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nubizasijimowedemo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baludugosutagaxoreforodul.pdf
    • https://cdn.shopify.com/s/files/1/0435/5643/8165/files/kikabul.pdf
    • https://cdn.shopify.com/s/files/1/0435/0106/0262/files/87287467016.pdf
    • https://cdn.shopify.com/s/files/1/0440/3917/6357/files/52416727502.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_off00006b5f.bin
1647416a350e10938b6766a21f45633347b84d64ac04ac20f31b389b598582d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5F 5448 bytes
font_01_sfnt_off00007e02.bin
a1863a641125c2777c9fa722326b1c8d3f416d1086ce66045306f3f04b31a0ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E02 10856 bytes

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