Malicious PDF — malware analysis report

Static analysis result for SHA-256 84f5020ad78c566e…

MALICIOUS

PDF

44.3 KB Created: 2020-08-07 12:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7f922a0b98e2974dad4ef5f80ac9c07 SHA-1: f9277729cd8f38d2dc958a2071dcb11ecd18643f SHA-256: 84f5020ad78c566e330f48a59299a4f334597d41d163cc1b1f8bb8d5a3b2a1be
150 Risk Score

Malware Insights

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

The PDF file contains numerous links to external resources, a common tactic for SEO link farms and redirector abuse. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same URL and references to a PDF about spatial autocorrelation, suggesting a lure. No scripts were extracted from this sample.

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=moran+s+i+spatial+autocorrelation+pdf
    • http://files.zudane.com/uploads/1/3/0/7/130775131/1ce7e3a06.pdf
    • http://files.michellexiao.net/uploads/1/3/1/6/131607346/xugex-xotosuzunixovir-kuvareduxifo-fufetatarifu.pdf
    • http://files.danberkey.net/uploads/1/3/1/4/131483386/6492457.pdf
    • http://files.jacquelinegreenough.com/uploads/1/3/1/0/131070491/a2068810305.pdf
    • https://cdn.shopify.com/s/files/1/0431/0692/6741/files/bexoruxeboriwigotifimoxi.pdf
    • https://cdn.shopify.com/s/files/1/0435/1678/8900/files/sportster_rear_shock_length.pdf
    • https://cdn.shopify.com/s/files/1/0432/2613/6731/files/kokufezizo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1747/8044/files/git_auto_deploy.pdf
    • https://cdn.shopify.com/s/files/1/0437/6988/8920/files/vopusag.pdf
    • https://cdn.shopify.com/s/files/1/0427/8986/3580/files/83109667404.pdf
    • https://cdn.shopify.com/s/files/1/0437/3417/1813/files/strength_of_materials_all_formulas.pdf
    • https://cdn.shopify.com/s/files/1/0434/5066/3073/files/.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/ipv6_address_generator.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_off000058f0.bin
f2bad8d34f0949166373ebe701fb7fd0e262efe31eee55be8ff6903d1ec54848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58F0 5156 bytes
font_01_sfnt_off00006a91.bin
31a5e0aa3f12e46f627b7e51ad893f020df5964e7fc4d735868d79c80b2172e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A91 10848 bytes
font_02_sfnt_off00008fee.bin
9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FEE 16036 bytes

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