Malicious PDF — malware analysis report

Static analysis result for SHA-256 089b738cfdc18efc…

MALICIOUS

PDF

49.4 KB Created: 2020-09-17 08:04:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cff67546e73faf81e56cc8563a197493 SHA-1: 824c0bf2ea4c79866c40d90e0bfb166f88e742c9 SHA-256: 089b738cfdc18efc852fa02d1ddcd37de22c4656563ccbc835ed88b67fe4a0d0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by an ML classifier and contains a large number of embedded URLs, including one pointing to known malicious redirector infrastructure. The document body itself contains a suspicious title and a URL, suggesting a lure for users to click on malicious links. The presence of a link farm indicates an attempt to distribute malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.me/wix?keyword=in+the+womb+national+geographic+full+video+1-10
    • http://files.canon-services.com/uploads/1/3/2/6/132681772/bofawatavi_nisijezagali_xonijejizu_duvuluredalu.pdf
    • http://koriwudi.abellcable.com/uploads/1/3/2/8/132815806/4180883.pdf
    • http://vavujalak.jacquelinereich.com/uploads/1/3/1/3/131379550/nowadelak.pdf
    • http://files.whythingsmatter.org/uploads/1/3/0/7/130776828/jitopevumirubuxezoz.pdf
    • http://famuku.mkgcleveland.com/uploads/1/3/2/7/132740480/binojosug.pdf
    • http://files.colhenryart.net/uploads/1/3/2/7/132740633/c5664.pdf
    • http://files.treasurevalleyorchidsociety.org/uploads/1/3/1/3/131398231/retumuwezizelozin.pdf
    • http://files.barbaravestal.com/uploads/1/3/1/4/131409037/xuboridej.pdf
    • http://witan.fittalentmanagement.com/uploads/1/3/1/6/131636745/kisodukeliw.pdf
    • http://files.semperfidelisconsultancy.co.uk/uploads/1/3/1/1/131164476/zotosiginanusas.pdf
    • http://webupu.theboondocs.org/uploads/1/3/0/7/130776826/putubure_pagixab_tagutoxosexed.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2259/7796/files/30178283083.pdf
    • https://cdn.shopify.com/s/files/1/0432/6365/6099/files/34554804091.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000810f.bin
a4ec6e9f9e813a98972355bdc5c1a13e3e0528f5f9644674f89a1fdbb47a9f6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x810F 5848 bytes
font_01_sfnt_off000094f3.bin
1905e9ace3e82b3a031ba7d2d423bdd15f11b40f929a94073af8fc03a5b953a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x94F3 10508 bytes