Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ae6e33256b2c610…

MALICIOUS

PDF

33.6 KB Created: 2020-10-30 08:44:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ed8cea566a96302dd46fe9b597e72d2 SHA-1: 9927481c621e765ee55baffd4002bf160786e6dd SHA-256: 3ae6e33256b2c6105cf09a2584dda3e15a69628cb557c15988c60e5b5d3c7ef6
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a redirector to 'ttraff.com' and a large link farm hosted on Weebly, indicating a malicious intent to redirect users to potentially harmful content. The document body, though obfuscated, contains keywords like '1999 f150 haynes manual' and references to 'wkhtmltopdf', suggesting a lure to disguise the malicious links. The ML classifier strongly flagged this PDF as malicious.

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/123?keyword=1999+f150+haynes+manual
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/guxiz.pdf
    • https://tamegafatukof.weebly.com/uploads/1/3/4/4/134400059/5557953.pdf
    • https://jadekida.weebly.com/uploads/1/3/4/3/134349878/da68dff9252f.pdf
    • https://cdn-cms.f-static.net/uploads/4403428/normal_5f94df6874155.pdf
    • https://jilibawijoza.weebly.com/uploads/1/3/4/3/134363321/8880117.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/951983a0-8ed2-4469-bf75-42ae8d2ea770/82822497214.pdf
    • https://uploads.strikinglycdn.com/files/a89c7daa-f06f-4de3-afae-74ce59020f51/kixedamonitivajul.pdf
    • https://uploads.strikinglycdn.com/files/67fd1605-a710-4266-ba83-a3244d7f2b35/weguxebogelum.pdf
    • https://uploads.strikinglycdn.com/files/30e12abe-3064-4419-a0ca-cda0539022aa/pokemon_gba_rom_hacks_nuzlocke.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003d7c.bin
9be854036e4949141b8310a6e15fd17791a72df3ec5c66aa8e910e32fe398d3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x3D7C 5036 bytes
font_01_sfnt_off00004e71.bin
0be35c97841d8cb6d0cb07585932550f7f4504ca6b30d944acad0451d23330ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E71 8652 bytes
font_02_sfnt_off00006c0d.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0D 4324 bytes