Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfa01343d29cc478…

MALICIOUS

PDF

61.4 KB Created: 2020-09-01 20:44:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e51779584a65ac64745571d45d609f4 SHA-1: 40ee23ee0481976bdf77c9126e537dcbb09bd4f1 SHA-256: bfa01343d29cc478c099f562c08e59815f5a243adc61b6404ee22a26adb5da3c
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a malicious domain, disguised as a coding interview cheat sheet. This is supported by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

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.club/wix?keyword=coding+interview+cheat+sheet+python
    • https://cdn.shopify.com/s/files/1/0430/0508/3811/files/25498334563.pdf
    • https://cdn.shopify.com/s/files/1/0435/4254/4533/files/malupalopaxegavalumegib.pdf
    • https://cdn.shopify.com/s/files/1/0433/6956/2266/files/public_policy_making_anderson.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/gotalilixiwor.pdf
    • https://static.usrfiles.com/ugd/6290de_c985f7d7c2c9488bad57cf2a0cccaa2b.pdf
    • https://static.usrfiles.com/ugd/9dda13_3a25295da781418d8fd91d05e249123c.pdf
    • https://static.usrfiles.com/ugd/6f7357_a286e3b1a7264daa9bee44d3a4756fce.pdf
    • https://static.usrfiles.com/ugd/837d34_e5599d86efd94018ba31bab29ef0270d.pdf
    • https://cdn.shopify.com/s/files/1/0463/3313/2955/files/niti_aayog_annual_report_2018.pdf
    • https://cdn.shopify.com/s/files/1/0431/7977/0019/files/16360088724.pdf
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/gitanjali_gems_annual_report_2015-_16.pdf
    • https://cdn.shopify.com/s/files/1/0431/9703/8756/files/sufemewutorazaxenagaxu.pdf
    • https://cdn.shopify.com/s/files/1/0441/3983/9640/files/wafam.pdf
    • https://cdn.shopify.com/s/files/1/0431/3320/6690/files/algebra_and_trigonometry_james_stewart.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_off0000a869.bin
96a4adcfa0479e3aae39c8e14dec8f20fcd5a4bcc49716c2080656bb8fd1e2e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA869 5464 bytes
font_01_sfnt_off0000bb10.bin
1acc8c5823effa06256b0e637d7bb7b0c4c288203783ec22182f104dfe455490		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB10 14308 bytes

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