Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba22fc9603dde1aa…

MALICIOUS

PDF

36.6 KB Created: 2020-11-03 05:46:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a096d8ad303293fd61f14ac84aed255 SHA-1: 77e21c1159e40724d4c30c8f239142696771a434 SHA-256: ba22fc9603dde1aa3d504d3e21cb49db7ef705b501cfa0f09a5b76f42ab0ff7d
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 malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links to other PDFs, suggesting a tactic to manipulate search engine results or distribute further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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/strik?keyword=papa+palm+beach+papa
    • https://cdn-cms.f-static.net/uploads/4403260/normal_5f9c48fe9b24d.pdf
    • https://nulixedupalaz.weebly.com/uploads/1/3/0/7/130739510/40c1e54.pdf
    • https://fozaxebefi.weebly.com/uploads/1/3/4/5/134584315/4325061.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/25ff34d3-9956-48e4-bc8d-81541af6dcae/pigman_novel.pdf
    • https://uploads.strikinglycdn.com/files/11872813-fd0c-452c-89cb-3ad05bf8f648/dodijeduwonuloviv.pdf
    • https://s3.amazonaws.com/gadumagabusodel/78042671908.pdf
    • https://cdn.shopify.com/s/files/1/0501/6656/2966/files/8728117564.pdf
    • https://cdn.shopify.com/s/files/1/0502/9678/3042/files/momizakufozaluvakufobeken.pdf
    • https://s3.amazonaws.com/livivuvuwugeb/97744706613.pdf
    • https://uploads.strikinglycdn.com/files/23daed85-cf35-4003-9de1-c7f8376f79f8/lippincotts_manual_of_psychiatric_nursing_care_plans_free.pdf
    • https://uploads.strikinglycdn.com/files/34b5098b-e2b5-4324-8ce9-db8065b52574/strat_wiring_diagram.pdf
    • https://uploads.strikinglycdn.com/files/3fc32cc9-05cb-4321-b57c-4fc7d489f117/lewiwem.pdf
    • https://s3.amazonaws.com/felasorarabipis/756664675.pdf
    • https://s3.amazonaws.com/kevava/air_conditioning_service_checklist.pdf
    • https://s3.amazonaws.com/guvovigo/pijeta.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_off000051ea.bin
ce559b368fffd913a286f605a5fdacf371f3e744f438672b3308bbfdbd81b5c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x51EA 5040 bytes
font_01_sfnt_off000062e8.bin
ebbc24427213312217711c5ed28b817232a5223e7870ac363f8a5bf4908fe19d
pdf-font-stream PDF embedded font (sfnt) at offset 0x62E8 10264 bytes