Malicious PDF — malware analysis report

Static analysis result for SHA-256 43f8fdeddd834d2f…

MALICIOUS

PDF

52.0 KB Created: 2020-08-12 04:33:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 799f9a2e062d907a6cb2bcd0fe7031e9 SHA-1: dabfd8592ff286991cf360d006782ed3ba098c34 SHA-256: 43f8fdeddd834d2f2dc0f2a4f1efd1734854d180451281dd2e09d2af17e6d363
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.cc/pify?keyword=ukulele+caged+system+pdf. The document body appears to be obfuscated or corrupted, but the presence of numerous links suggests a link farm or phishing attempt. No scripts were extracted from this sample.

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.cc/pify?keyword=ukulele+caged+system+pdf
    • http://files.kennydale.org/uploads/1/3/1/4/131407284/75e1eee4919.pdf
    • http://files.getpapicuisine.com/uploads/1/3/1/3/131383771/f18e72954d13c2.pdf
    • http://files.tonysconstructioninc.com/uploads/1/3/1/1/131164275/koxekemapejufiluzo.pdf
    • http://files.michelleprocida.com/uploads/1/3/1/8/131856907/dimin.pdf
    • http://files.yorkregencydancers.com/uploads/1/3/1/1/131163669/f797bfa72554f.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/juvafozabamemasen.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4632/files/kivawaneredamukitefemi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7249/5526/files/abelmoschus_moschatus.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/24238598059.pdf
    • https://cdn.shopify.com/s/files/1/0428/2325/4179/files/born_to_be_wild_tabs.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/20012973448.pdf
    • https://cdn.shopify.com/s/files/1/0434/7900/7398/files/over_and_over_nelly.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/zekefalexorutesawu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6622/0956/files/volidojeba.pdf
    • https://cdn.shopify.com/s/files/1/0431/7541/1872/files/63894311300.pdf
    • https://cdn.shopify.com/s/files/1/0432/2548/1379/files/biztalk_server_2020_unleashed.pdf
    • https://cdn.shopify.com/s/files/1/0446/4692/4451/files/curriculum_vitae_formato_europeo_compilabile.pdf
    • https://cdn.shopify.com/s/files/1/0430/2091/0746/files/tisewatolawizisilim.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_off00007734.bin
3395c06cf0755e20adbb570d9f9d85ce1791dd5e2c47ad9c2208a83054f69193
pdf-font-stream PDF embedded font (sfnt) at offset 0x7734 5536 bytes
font_01_sfnt_off00008a14.bin
65ac34c7a663f022d5901a830992515f1dff632b5c7f7a8e80cb9c3b76a2935d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A14 10252 bytes
font_02_sfnt_off0000ad59.bin
fb7b45e24c28c4473d0ca1c6410c593992d9a809009f9c41b5ae32c9142507dd
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD59 16120 bytes