Malicious PDF — malware analysis report

Static analysis result for SHA-256 709ba80bd6ba4679…

MALICIOUS

PDF

48.0 KB Created: 2020-10-16 06:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 75dc5872933088c6312d16b5b1442271 SHA-1: b161798420e0863a4c2b6c8a4bff01716d6a747f SHA-256: 709ba80bd6ba4679bfb544bb16368a67da23870c60f7cbdf76b4c5070a767c65
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=make+my+pdf+smaller+file+size+mac In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f87056412921.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367627/normal_5f88ed2305fe6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367294/normal_5f88d8892cb70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f86febd66481.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369904/normal_5f890b3ee7c1a.pdfIn PDF document text
    • https://site-1037184.mozfiles.com/files/1037184/66026757628.pdfIn PDF document text
    • https://site-1041934.mozfiles.com/files/1041934/rimapekoxekutofewe.pdfIn PDF document text
    • https://site-1043958.mozfiles.com/files/1043958/rubolokowakilum.pdfIn PDF document text
    • https://site-1037869.mozfiles.com/files/1037869/16660721480.pdfIn PDF document text
    • https://site-1040575.mozfiles.com/files/1040575/bowoludoratenera.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8753e576-bf7b-442a-b7e2-474a2fb4f6e9/40316257441.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26a50f03-a1f4-4280-b05d-66baa8cd70a9/dezubijefaxiti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eefddfc-9025-4f8e-bb9a-03d367e64e0b/kuwarijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfb5c809-305f-46b2-9835-3a75fff138dc/13042827712.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2048d5b4-f00c-4d87-b3d3-b94fb964d7ae/53427184843.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3697/5004/files/tawakolurajipunebikotet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5529/2321/files/marlboro_skyline_vs_smooth.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4104/5145/files/sample_letter_for_professor_thank_you.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5526570f-3ae6-4f35-94a6-7cbde24b0bd6/63046575171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebb3ab1b-3f7d-4cf5-a1f6-a8602b022f27/90176751924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e133e1ed-4439-43a6-8685-713345b868a8/jepatadupimebolopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28b8c73a-1109-428b-a25b-cb3c55934ebb/31313575744.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8a10b54-d5ab-4a93-92e7-dd882e1f4a91/wijirezexazuwujobovawuzi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3B 5524 bytes
SHA-256: b6c2e569e19597f17b8463e2cfda96fb1d6d2f406faaafdf6eea25dfaa33a7d8
font_01_sfnt_off00008d06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D06 11180 bytes
SHA-256: a81ffd02518a5cc99bc57dd2be3aefc3ff41d1172da42b76ed340fcab77234c6

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