Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a3df411fb91a768…

MALICIOUS

PDF

40.9 KB Created: 2020-09-07 17:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 974ab7d679adb51068cb1a4a8ee488a5 SHA-1: cd0f17cd3000e20099e90f63ab49ea20fd86a00b SHA-256: 4a3df411fb91a7685e213d4ac5ce34339a15fa0160eb7779c4c4980dcd6f13ca
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a prominent link disguised as a virus alert, directing users to 'ttraff.club'. This URL is flagged as a malicious redirector. The document also includes a large number of links to PDFs hosted on Shopify, likely as part of a link farm to improve search engine ranking for malicious lures. The presence of a password archive lure and a browser update lure further indicates a social engineering attempt to trick the user into downloading or executing further malicious content.

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.club/wix?keyword=chrome++failed+virus+detected+fix
    • https://cdn.shopify.com/s/files/1/0431/7252/8292/files/60538788620.pdf
    • https://cdn.shopify.com/s/files/1/0453/4947/0363/files/70435800604.pdf
    • https://cdn.shopify.com/s/files/1/0432/3606/5435/files/99587644804.pdf
    • https://cdn.shopify.com/s/files/1/0433/4954/1017/files/github_force_pull.pdf
    • https://cdn.shopify.com/s/files/1/0436/4949/9289/files/29696280097.pdf
    • https://cdn.shopify.com/s/files/1/0457/8505/5398/files/calorimetry_problems_1_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0439/8999/1582/files/ardramee_dhanumasa_ravukalonnil_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0437/5071/9637/files/99553437142.pdf
    • https://cdn.shopify.com/s/files/1/0434/4646/8769/files/antibioticos_de_uso_veterinario.pdf
    • https://cdn.shopify.com/s/files/1/0431/0132/3420/files/loeffler_randall_shoes_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/angular_6_formgroup_default_value.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6140/files/tapamojusovefexatabigedu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3625/3087/files/41597159945.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_off000061e2.bin
d68d68d5be1b7b6e057992de4f5ff24f389f8250c871772f4c61b7b4016933b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x61E2 5296 bytes
font_01_sfnt_off000073bc.bin
3a25048bb11a73e255b19d1a21b9b592411b90883928e3876addd3e37dd2b669
pdf-font-stream PDF embedded font (sfnt) at offset 0x73BC 10296 bytes