Malicious PDF — malware analysis report

Static analysis result for SHA-256 acc35a15cde48609…

MALICIOUS

PDF

48.4 KB Created: 2020-08-22 12:26:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c2e541033241f772a73e3456f0cc48f SHA-1: 51afc1c76e95daa83ebf33acba75c5e0a2a6e652 SHA-256: acc35a15cde4860953025c202bf2ad3970b60d03e4f00fdb26d2ce10bc4f8738
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.001 PowerShell

The PDF contains a mass of external links, with one prominent link pointing to a redirector. The document body explicitly mentions 'Chrome extension crx file' and includes the URL 'https://ttraff.com/pify?keyword=chrome+extension+crx+file', indicating a social engineering lure to install a malicious browser extension. The presence of numerous PDF links hosted on Shopify, while many are benign, suggests a link farm tactic to obscure the malicious redirector.

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.com/pify?keyword=chrome+extension+crx+file
    • http://gajemej.glittermesassyonlineboutique.com/uploads/1/3/1/4/131437778/d15975bc6c8.pdf
    • https://cdn.shopify.com/s/files/1/0429/4744/4899/files/rufutegezifefotatuxijibu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6612/0602/files/ielts_academic_reading_passages_for_practice_filetype.pdf
    • https://cdn.shopify.com/s/files/1/0428/9862/0569/files/weight_lifting_programs.pdf
    • https://cdn.shopify.com/s/files/1/0444/3917/5335/files/bucaneras_con_plataforma.pdf
    • https://cdn.shopify.com/s/files/1/0428/7250/4483/files/7568974141.pdf
    • https://cdn.shopify.com/s/files/1/0441/0313/9480/files/expressed_implied_or_inherent_power_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/gabarulupep.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/93486877204.pdf
    • https://cdn.shopify.com/s/files/1/0450/7539/8821/files/vivud.pdf
    • https://cdn.shopify.com/s/files/1/0431/6895/6565/files/95107669269.pdf
    • https://cdn.shopify.com/s/files/1/0429/3751/6191/files/78412399175.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/31492922879.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_off00007fa3.bin
648f0a4633d9239bec5acef9fd5451ee8b0bba35ba7954f96ab6369e28922f65
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA3 4884 bytes
font_01_sfnt_off00009020.bin
6898a4c940065f868fc1a6226d8e7cc7121ebf8819fe0d310530638771217db0
pdf-font-stream PDF embedded font (sfnt) at offset 0x9020 10780 bytes