Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b962c8e37025431…

MALICIOUS

PDF

41.9 KB Created: 2020-08-27 16:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 885a751e06b3b541c19a475bf1a2af01 SHA-1: 11a8f93abf194c396290cef31f8adf9488aefd64 SHA-256: 4b962c8e370254310fab80027902ea368a13e2add71fee50cfe38993bce413a6
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The primary malicious URL is https://ttraff.com/pify?keyword=divisi%25C3%25B3n+de+la+operaci%25C3%25B3n+en+sus+elem. While many other URLs are present, they appear to be part of a SEO link farm strategy, with most resolving to benign content. No scripts were extracted from this sample, and the document body is heavily obfuscated.

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.com/pify?keyword=divisi%25C3%25B3n+de+la+operaci%25C3%25B3n+en+sus+elem
    • http://files.churchillpublishing.net/uploads/1/3/0/8/130873876/dd9bf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1013/files/17293133350.pdf
    • https://cdn.shopify.com/s/files/1/0434/2556/2775/files/brushless_dc_motor.pdf
    • https://cdn.shopify.com/s/files/1/0457/7551/9910/files/sistema_de_lubricacion_del_motor_die.pdf
    • https://cdn.shopify.com/s/files/1/0428/9999/6839/files/gugez.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65431134640.pdf
    • https://cdn.shopify.com/s/files/1/0433/3027/3435/files/fuvozipaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/free_driver_asus_x455ld.pdf
    • https://cdn.shopify.com/s/files/1/0436/3576/9497/files/51356107496.pdf
    • https://cdn.shopify.com/s/files/1/0433/9662/8641/files/biology_mcq_in_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0451/1003/4597/files/3655861144.pdf
    • https://cdn.shopify.com/s/files/1/0440/8341/3142/files/1nf_2nf_3nf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0556/6366/files/kuxetajivakete.pdf
    • https://cdn.shopify.com/s/files/1/0437/8384/8093/files/5027897867.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_off00006579.bin
6c3b5546cb69f08f1b245b16478faca8607545e83b430a909d667bf30a8c368f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6579 5416 bytes
font_01_sfnt_off0000778e.bin
effd94e6cc0a1f79d35e7902af3a37789ccba30226bc726697a7124728db41f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x778E 10204 bytes

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