Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b099b545ee984ff…

MALICIOUS

PDF

49.6 KB Created: 2020-07-30 03:20:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6190ffe5fea70aa0c2eec0261cf2308b SHA-1: f91dc8e80e59d254bd265cfc35868038ca315d8a SHA-256: 8b099b545ee984ff1f93c2d7635c6c290fd6401417da0a6acc69e040dc533d10
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic indicates that the PDF links to a known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be related to academic notes, likely serving as a lure. The primary attack vector involves directing users to malicious sites via these links.

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.cc/pify?keyword=business+communication+notes+for+bba+pdf
    • http://files.wrenphotographynd.com/uploads/1/3/1/4/131406930/gerabegajok.pdf
    • http://files.erdius.org/uploads/1/3/2/7/132740804/wuwoferanumufib.pdf
    • http://files.indipix.co.in/uploads/1/3/2/6/132681368/suzepemolaluzi_zomiguwop.pdf
    • https://cdn.shopify.com/s/files/1/0429/6219/0499/files/57505190272.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/22356459904.pdf
    • https://cdn.shopify.com/s/files/1/0438/1474/8322/files/dutujapetiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/6179/6248/files/rogitu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3556/files/miziwadudama.pdf
    • https://cdn.shopify.com/s/files/1/0429/0982/7231/files/81165589786.pdf
    • https://cdn.shopify.com/s/files/1/0432/7620/6235/files/peletokixu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3406/7615/files/77020719383.pdf
    • https://cdn.shopify.com/s/files/1/0432/6499/9590/files/42847204293.pdf
    • https://cdn.shopify.com/s/files/1/0430/6809/6661/files/88537094782.pdf
    • https://cdn.shopify.com/s/files/1/0436/1938/5504/files/84300899341.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_off00007ead.bin
a43b579c3182e9151377dadad14e25a9d1685306c94195fd1cd5b036ed7861e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EAD 5340 bytes
font_01_sfnt_off000090a6.bin
61cc4c5159c0e8efcfe2c40a354b0e0a3ea96cac9da3a145dc474ede8fd8360c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90A6 12724 bytes

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