Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d76c10d925be097…

MALICIOUS

PDF

83.3 KB Created: 2020-07-10 17:35:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4289adde0b9daedbfb42131898d5780 SHA-1: 61f325b02d5e86af179e98b3f7c551d9a4508bd9 SHA-256: 6d76c10d925be097d2e5d4652b0da3a8acab9f33f19b8c646c4e6105627cc704
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to drive traffic to potentially malicious sites. The ML classifier also strongly indicated maliciousness.

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.com/wb?keyword=exclusion%20social%20y%20discapacidad%20pdf
    • http://files.fryeins.com/uploads/1/3/2/6/132681448/zemoxinujevubo.pdf
    • http://files.oceanworksgroup.com/uploads/1/3/2/7/132712063/jesonozu_rizotemotux_wefafikenabu.pdf
    • http://files.thecuriouscatgiftshop.com/uploads/1/3/2/6/132681596/puwakir.pdf
    • http://files.conniemorey.com/uploads/1/3/2/6/132695343/dunetaxono_jadonoz.pdf
    • http://files.drmeganparis.com/uploads/1/3/0/7/130739029/343be577462b7.pdf
    • http://files.imarsonline.com/uploads/1/3/1/3/131380413/6c76ebc2.pdf
    • http://files.thomashodgesmusic.com/uploads/1/3/0/8/130874352/7231953.pdf
    • http://files.dougwrightracing.com/uploads/1/3/1/4/131483255/88f9c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://mijawodemim.files.wordpress.com/2020/06/56442795269.pdf
    • https://mutemoxapeko.files.wordpress.com/2020/06/tuzupupebunakas.pdf
    • https://jolemafe.files.wordpress.com/2020/06/37286935674.pdf
    • https://begotaju.files.wordpress.com/2020/07/81363920740.pdf
    • https://wogediganote.files.wordpress.com/2020/07/direvenepuwalevefalawukod.pdf
    • https://nezosuropop.files.wordpress.com/2020/07/lusobilofujo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/4470786092.pdf
    • https://cdn.shopify.com/s/files/1/0428/2174/6847/files/5428584239.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/34530012154.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81108552740.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_off00010770.bin
7b3806b23515c4b294599256ed6b5c7528201caf01299080df3502c600bd7ef2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10770 4864 bytes
font_01_sfnt_off0001180c.bin
6c3b928efe9e64784d63b5872739a0a06b5ee5aaa1c7a83d177edaf591290d2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1180C 11672 bytes

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