Malicious PDF — malware analysis report

Static analysis result for SHA-256 2385f8a766b7da6b…

MALICIOUS

PDF

33.5 KB Created: 2020-08-15 14:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 991e2fea76cab15233cf9992375af52b SHA-1: dcd7d21d187236d0da39223b872539af2ce8ba37 SHA-256: 2385f8a766b7da6b759a34dc38b7b6437678825380d34433eba44467daaa9832
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to shopify.com, but one critical link directs to a known malicious redirector at ttraff.cc. The document body, though heavily obfuscated, contains the same keyword as the redirector URL, suggesting a lure. The primary intent appears to be redirecting the user to malicious infrastructure via the ttraff.cc URL.

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=lady+gaga+bradley+cooper+oscar+shallow+performance
    • http://sujafal.kellypenmanrealestate.com/uploads/1/3/0/9/130969045/xakatasigopiwovow.pdf
    • http://gunazinap.elmundodebirch.com/uploads/1/3/1/4/131454415/5f48077f82e.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70945418412.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/60963737428.pdf
    • https://cdn.shopify.com/s/files/1/0429/2391/7478/files/miwibuxolidovowe.pdf
    • https://cdn.shopify.com/s/files/1/0439/4863/8363/files/tesefojaselore.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/29065954459.pdf
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/sujomojawefeganaxiw.pdf
    • https://cdn.shopify.com/s/files/1/0439/1731/2168/files/localizar_mi_celular_android_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0441/0081/2952/files/change_user_name_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0431/7655/8746/files/65604838004.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9158/files/fipadorub.pdf
    • https://cdn.shopify.com/s/files/1/0431/7691/9194/files/visegowi.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_off00004533.bin
547f087d61e9a6f7bb7fb1fc6092ee8e24c9e27630fe6be7fc244cc1cd0a6575		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4533 5844 bytes
font_01_sfnt_off0000590d.bin
b66efbaa7c5af393644355aa0e318dac4caa3080a3abbdee9a7aa4480048822d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x590D 9464 bytes

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