Malicious PDF — malware analysis report

Static analysis result for SHA-256 e27f491852581cd5…

MALICIOUS

PDF

48.6 KB Created: 2020-10-30 17:06:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e01915bfb1685b5a1f462d73ea6ad5c9 SHA-1: 15c4ff922f7e5a2a3fa11dd1894083faa9b75345 SHA-256: e27f491852581cd52b2655b9776930f62c68b2039cd80658eb6b5239e68428d0
154 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are hosted on suspicious domains and appear to be part of a link farm. The document body, though heavily obfuscated, contains a URL that redirects to a malicious site, suggesting the document's primary purpose is to redirect users to potentially harmful content. 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://ggtraff.ru/123?keyword=reign+of+kings+building+guide
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/72890.pdf
    • https://mixekolasum.weebly.com/uploads/1/3/4/3/134388380/kotumamepubigog_darituvav_nupexebuwip.pdf
    • https://cdn-cms.f-static.net/uploads/4370319/normal_5f98f27f9eaae.pdf
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/kumuguxasij.pdf
    • https://cdn-cms.f-static.net/uploads/4387242/normal_5f910305802b7.pdf
    • https://cdn-cms.f-static.net/uploads/4376099/normal_5f8a138f97afb.pdf
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/5301197.pdf
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/mudonij-tojoxe-xewej.pdf
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f8b498057769.pdf
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5f8ec29ad0c1c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0483/0615/9779/files/2144252798.pdf
    • https://uploads.strikinglycdn.com/files/17e0e79c-3551-4564-b6ce-3689a3730977/8836027315.pdf
    • https://cdn.shopify.com/s/files/1/0498/8524/9710/files/indesign_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0268/7926/2918/files/simile_and_metaphor_worksheet_3_answers.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_off0000811c.bin
72478d295ce893148de0c311d6435280e77279cb644a92fac17587355431a8fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x811C 4980 bytes
font_01_sfnt_off00009235.bin
8c71b0355826f1952726e52d674c1e1bfef46f73c85cf83d7fe6741b109c4b24
pdf-font-stream PDF embedded font (sfnt) at offset 0x9235 10288 bytes