Malicious PDF — malware analysis report

Static analysis result for SHA-256 54c4b3103fae8bf7…

MALICIOUS

PDF

71.3 KB Created: 2020-08-11 15:33:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 650d30781c65e9542bc00ea7e387a8a9 SHA-1: 3deeece065a2c4e407cdf35233c5d422a7ce0850 SHA-256: 54c4b3103fae8bf747210bad59a84feaf423955b5bf359545016999d61d1f304
120 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK'. The document body, though heavily obfuscated, contains the text 'Neurological assessment nursing pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous external PDF links also indicates a link farm strategy.

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=neurological+assessment+nursing+pdf
    • http://tasajapu.putinbaygardenclub.com/uploads/1/3/2/8/132814930/vurobabur.pdf
    • http://vigodu.themistressclaudia.com/uploads/1/3/1/3/131383775/tamazopugesebowuxew.pdf
    • http://files.amotionfilms.com/uploads/1/3/2/8/132815916/793758aec5.pdf
    • https://cdn.shopify.com/s/files/1/0434/4945/0661/files/79313165951.pdf
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/actovegin_prospect.pdf
    • https://cdn.shopify.com/s/files/1/0433/1975/4907/files/19772764018.pdf
    • https://cdn.shopify.com/s/files/1/0434/2035/2677/files/nifumapub.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6482/files/12480875678.pdf
    • https://cdn.shopify.com/s/files/1/0429/7159/4911/files/80202137224.pdf
    • https://cdn.shopify.com/s/files/1/0435/2586/5636/files/80121660213.pdf
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/36546336688.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/faramerujinusopuko.pdf
    • https://cdn.shopify.com/s/files/1/0436/1977/8723/files/xamid.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6216/files/3360166555.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_off0000d97e.bin
cbb325d0ca909a972c827eba1bb42fcc68ba35cf9f5b0ca246f5f0b0868e9089		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD97E 5444 bytes
font_01_sfnt_off0000ebf9.bin
672c835a65e5752333a12c86a673a0aeb00358de1c2dca1e7daea7f1b1992546		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF9 10664 bytes

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