Malicious PDF — malware analysis report

Static analysis result for SHA-256 e13181cd8cabb00e…

MALICIOUS

PDF

42.0 KB Created: 2020-08-24 10:39:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97ffc30ad74ccefbaaf16fa001b49b6c SHA-1: 8470b5f60d328962b9b4b4882cc975bd56d3081a SHA-256: e13181cd8cabb00e5d3861ea39d52ba922706a47e593f7311b4135fbd57891a6
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The ML classifier strongly supports the malicious verdict.

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.com/pify?keyword=anticoagulation+for+atrial+fibrillation+guidelines
    • http://files.waltonfamilymoving.com/uploads/1/3/1/8/131871642/dizivebix.pdf
    • http://nesepit.lesswastelaura.com/uploads/1/3/0/9/130969060/fepem.pdf
    • http://files.mrsresler.com/uploads/1/3/0/7/130776273/wedukaxixudas.pdf
    • http://laxuto.thecookteaser.com/uploads/1/3/1/4/131406744/fideg_kinemij_burikaxigibovub_rovetosifinezoj.pdf
    • http://gewabi.soireepa.com/uploads/1/3/1/6/131607919/1958257.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/46756699899.pdf
    • https://cdn.shopify.com/s/files/1/0430/3867/1010/files/54018683983.pdf
    • https://cdn.shopify.com/s/files/1/0435/8111/2483/files/super_mario_nes.pdf
    • https://cdn.shopify.com/s/files/1/0435/7737/6936/files/sobegimofazafolaravu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/nupokifugopebusifidom.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1779/files/22561256477.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/des_moines_iowa_police_department_accident_reports.pdf
    • https://cdn.shopify.com/s/files/1/0435/9543/2099/files/72785250930.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_off00006591.bin
6d628cb2f8281f235593ac9d21cdadf2f471fb9a0099194bda9cfa8e276f2585		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6591 5316 bytes
font_01_sfnt_off000077a9.bin
0d6b88060691b82f999523e70dd41ed23d2ae39a7d0f01c3e3d0b4897f2aa779		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A9 10376 bytes

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