Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d50ebd1e040e2ae…

MALICIOUS

PDF

44.1 KB Created: 2020-10-28 15:49:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: d2f8e6f25a4894b75a9e5f71aa86023b SHA-1: 877e9cd5d808ef4658bb506cf8219a11cfcb96d3 SHA-256: 2d50ebd1e040e2aec17bc82ae2aa88a157b0367189377f6372c7e11438cfb141
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://cctraff.ru/aws?keyword=what+is+the+minimum+size+of+a+home+theatre+room In PDF document text
    • https://kenometiwu.weebly.com/uploads/1/3/4/3/134340836/6a31d09e15ee5e.pdfIn PDF document text
    • https://joleziravakejar.weebly.com/uploads/1/3/4/4/134460301/864b3a49.pdfIn PDF document text
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/885082.pdfIn PDF document text
    • https://lizotolagodega.weebly.com/uploads/1/3/4/4/134495854/eddffe17.pdfIn PDF document text
    • https://zozigowava.weebly.com/uploads/1/3/4/3/134387142/baduximajadi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377401/normal_5f9336e4185f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f86f97fec65f.pdfIn PDF document text
    • https://bavejojonosepes.weebly.com/uploads/1/3/1/3/131380601/zumufas.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/3744028.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/8c3f11ed.pdfIn PDF document text
    • https://xakexoxos.weebly.com/uploads/1/3/4/3/134307698/tutufodebu-tesog.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/1114918.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005c44.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005c44.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off00009329.bin)
    • https://cdn.shopify.com/s/files/1/0433/7808/1959/files/21219828713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6134/4406/files/89734838666.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/045adbc3-763a-4bc9-8d49-57e432b3c575/84880152482.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55869897-b70a-4962-b5d9-bc57c888485b/92448627720.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5023/8101/files/fniding_the_shippong_expense_on_a_contribution_format_income_statement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cbac7f1-5ec9-4471-a718-3d56716af600/audi_q7_houston.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 extracted file (font_00_sfnt_off00005c44.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C44 4920 bytes
SHA-256: 77b92a5f3098a6ec6d703bb5b54a318802e9773fe2dd1fab200f75277c47be78
font_01_sfnt_off00006cea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CEA 11504 bytes
SHA-256: 94475d63d64e9a0d10f2f51d5432dbf9c2841f41eced091107034ba53023a6a0
font_02_sfnt_off00009329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9329 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3