Malicious PDF — malware analysis report

Static analysis result for SHA-256 2371fa063fc5ac46…

MALICIOUS

PDF

41.2 KB Created: 2020-08-21 02:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac808397ed1826aa56ee1f333786340a SHA-1: ddec3dffc5b1df42ba5c53aac5130f34f827a3ab SHA-256: 2371fa063fc5ac46318ded04a08e29c2536c9f9b4b4950a73b308239666f3398
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically to `https://ttraff.ru/pify?keyword=child+vaccination+chart+pdf`. This indicates a social engineering attempt to lure victims through a seemingly relevant topic. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=child+vaccination+chart+pdf
    • http://files.heathergreig.com/uploads/1/3/0/7/130739651/8c518081b.pdf
    • http://files.morriscountyplaytherapy.com/uploads/1/3/0/8/130814515/13957b015.pdf
    • http://wojutesa.yellowstonebiblecamp.com/uploads/1/3/1/3/131378776/pejamogep.pdf
    • https://cdn.shopify.com/s/files/1/0434/5698/7296/files/prime_minister_kamyab_jawan_sme_lending_program_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0445/3023/7599/files/43294739428.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/akademikong_pagsulat_halimbawa.pdf
    • https://cdn.shopify.com/s/files/1/0428/1512/7708/files/o_mio_babbino_caro_imslp.pdf
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/45041596241.pdf
    • https://cdn.shopify.com/s/files/1/0441/1149/5320/files/13570009472.pdf
    • https://cdn.shopify.com/s/files/1/0449/0277/6999/files/33877791986.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5236/files/nerusavoripadetumoside.pdf
    • https://cdn.shopify.com/s/files/1/0435/8235/7663/files/using_stata_for_principles_of_econometrics.pdf
    • https://cdn.shopify.com/s/files/1/0435/0610/6528/files/59857508836.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_off00006587.bin
c249e55fedef34c40aed1766f26381e733ddc8f415ad9147851eaa9cb6b5cd29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6587 5032 bytes
font_01_sfnt_off0000769f.bin
d34058f34d0dfd3798e7f19e28a6d3302b20bb9d5196ec0d137d6fd194cf7b03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x769F 9884 bytes

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