Malicious PDF — malware analysis report

Static analysis result for SHA-256 3703c1aebc240b68…

MALICIOUS

PDF

41.5 KB Created: 2020-11-05 05:39:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65c83ea2dcaa37f6a2f5019dfce099c3 SHA-1: 744b50f5a679728303c985a8c5f3ffd3940e1d9c SHA-256: 3703c1aebc240b687502244aaf1cef24a1d213cc7f1c5f2196f84be22bdf48cc
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to 'George Washington dollar coins worth' and includes the malicious URL. The presence of numerous external PDF links further indicates a link farm or redirection scheme, likely intended to lead users to malicious content.

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://gettraff.ru/strik?keyword=george+washington+dollar+coins+worth
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/resebubede-gafifetomo-sexosatasuvole-jijazusifa.pdf
    • https://murikupa.weebly.com/uploads/1/3/4/4/134481598/dijetu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xezonijida/fifulelafenile.pdf
    • https://s3.amazonaws.com/vavabi/wexiwisewogunitorazo.pdf
    • https://uploads.strikinglycdn.com/files/9c06df56-6d2d-4d17-870a-c07930a20592/lusisivaluf.pdf
    • https://s3.amazonaws.com/gopuze/que_es_arquitectura_empresarial.pdf
    • https://uploads.strikinglycdn.com/files/07986e1f-7a9f-4108-9bf4-a1a08817db9c/27472155785.pdf
    • https://s3.amazonaws.com/lezopobigeza/38826911563.pdf
    • https://s3.amazonaws.com/tulosa/91563321226.pdf
    • https://uploads.strikinglycdn.com/files/e1f4e4c7-60a4-4bb2-8178-e4fbff10b784/71955303889.pdf
    • https://uploads.strikinglycdn.com/files/f205168d-4a01-4787-be3d-d815a4234cb0/96761687565.pdf
    • https://uploads.strikinglycdn.com/files/3f23a8e0-79ae-42ca-8e0c-a28d6a09b04e/the_illustrated_man_the_rocket_man.pdf
    • https://s3.amazonaws.com/pibabopuduj/constant_term_in_binomial_expansion.pdf
    • https://s3.amazonaws.com/tadovu/77731590270.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_off00006393.bin
7e2352c24970fa7e5a2692c23bc61c946c9ea35ab669236c6432b12479a28efe
pdf-font-stream PDF embedded font (sfnt) at offset 0x6393 5324 bytes
font_01_sfnt_off000075bc.bin
f7b31842a2f118847cdcda50c6dfcc43ffe7bd877b6f0264d8f8e8edf6c41c98
pdf-font-stream PDF embedded font (sfnt) at offset 0x75BC 10520 bytes