Malicious PDF — malware analysis report

Static analysis result for SHA-256 7698cdda3ce2d61f…

MALICIOUS

PDF

42.0 KB Created: 2020-08-24 07:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b59b2da292addaf86a5e107d2d919da7 SHA-1: 26aab63a9aacf64db142a1bff308e82a3ed983c7 SHA-256: 7698cdda3ce2d61fe067c9cf3cdaf1071e314b640a88d497ee9b4fd1db9ddf4c
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Stephen King the boogeyman pdf' and the malicious URL, suggesting a lure to download malicious content. The presence of multiple external PDF links, many hosted on Shopify, indicates a link farm designed to attract search engine traffic and distribute malicious files. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=stephen+king+the+boogeyman+pdf
    • http://files.nocofoodincubator.com/uploads/1/3/1/1/131163856/soxifonuno-rerodakazikupu-fusudiz-wezonozamu.pdf
    • http://xerodizen.cityislandlines.net/uploads/1/3/1/4/131482975/nanuzetiwevo.pdf
    • http://zufuji.emcspreaders.com/uploads/1/3/0/7/130740044/tizejijog.pdf
    • https://cdn.shopify.com/s/files/1/0436/1653/4685/files/povatima.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4240/files/91942738633.pdf
    • https://cdn.shopify.com/s/files/1/0429/5570/2425/files/wagemamapaverasof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89573664631.pdf
    • https://cdn.shopify.com/s/files/1/0433/8394/7427/files/poxatu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/magobusiriwolozun.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/amar_ujala_news_today.pdf
    • https://cdn.shopify.com/s/files/1/0435/9471/1203/files/81400247068.pdf
    • https://cdn.shopify.com/s/files/1/0452/2449/3213/files/9742942184.pdf
    • https://cdn.shopify.com/s/files/1/0438/4188/0224/files/administrao_financeira_e_oramentria_3d_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8298/files/bepusofarufer.pdf
    • https://cdn.shopify.com/s/files/1/0429/7929/5383/files/87788999741.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8036/files/business_communication_essentials_courtland_bovee_john_thill.pdf
    • https://cdn.shopify.com/s/files/1/0436/3472/0928/files/ai_mai_mi.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_off00006586.bin
00bfc66538cd9bff781d9f2b3c0a9a076c9de465650074e155aad2f6c16fccc6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6586 5560 bytes
font_01_sfnt_off0000784c.bin
d267d933108e4c1a2b1a705d243f0fc5929044625846931d59dc1b1606ab2e21
pdf-font-stream PDF embedded font (sfnt) at offset 0x784C 10268 bytes