Malicious PDF — malware analysis report

Static analysis result for SHA-256 c31025ed489b854a…

MALICIOUS

PDF

53.0 KB Created: 2020-08-08 09:46:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e872a5b397d0f5a44447a58734dce8e1 SHA-1: 0477b563738f7aa60564ba9ce020275587e77fdc SHA-256: c31025ed489b854ac6f7a7d27cd4474050af4c43cc133dc1cfeda3a59f68d7b4
162 Risk Score

Malware Insights

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

The PDF contains a lure suggesting it is an 'Rscit application form' and prompts the user to install a browser extension or update. It embeds numerous links, with one critical heuristic identifying a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=rscit+application+form+pdf'. Another heuristic indicates a large number of external PDF links, many hosted on Shopify, suggesting a link farm for SEO manipulation or distribution. The primary intent appears to be social engineering users into clicking malicious links, likely leading to further malware downloads or credential theft.

Heuristics 4

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=rscit+application+form+pdf
    • http://jatowi.malliefe2o3.com/uploads/1/3/1/4/131437615/8725480.pdf
    • http://files.lauradubin.com/uploads/1/3/1/4/131453302/6261087.pdf
    • http://files.campbornthisway.org/uploads/1/3/0/7/130775724/laligoz-tukifat.pdf
    • http://files.brigalowlimousins.com/uploads/1/3/1/0/131070165/2660577.pdf
    • https://cdn.shopify.com/s/files/1/0435/8517/5713/files/62254207421.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/apostrophe_of_possession_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/9856/1948/files/a_very_short_introduction_to_analytic_philosophy.pdf
    • https://cdn.shopify.com/s/files/1/0439/8183/2350/files/revud.pdf
    • https://cdn.shopify.com/s/files/1/0431/1787/1255/files/84623274043.pdf
    • https://cdn.shopify.com/s/files/1/0436/4405/9806/files/96914857723.pdf
    • https://cdn.shopify.com/s/files/1/0435/2973/2248/files/73488765371.pdf
    • https://cdn.shopify.com/s/files/1/0438/8595/3192/files/vizawofeduribikuwiwevosi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27247465441.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/aditya_hrudayam_stotram_lyrics_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/volepazaxofole.pdf
    • https://cdn.shopify.com/s/files/1/0430/1016/2837/files/dokawe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064e6.bin
0c741cdb7a70b65d305e9f53d3262543cb5a3b8f5bdee07546f51c29c3d1fbe2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E6 5308 bytes
font_01_sfnt_off000076e4.bin
a51ea25734d747fa9f53fccf6d6610ff55be19cc83a749ee751231669824fc07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76E4 15872 bytes
font_02_sfnt_off0000a8a4.bin
2d5f6121a46312461c94a6e6e33d8fda2a1255f7827301cc11fa36bdd8f331f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8A4 9640 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.