Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6f6eff517574639…

MALICIOUS

PDF

40.8 KB Created: 2020-10-08 19:18:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 7c3ef01ed2de17c65de70a7935b3338f SHA-1: f94d4b2749ea31c1a1c9df4528920cf2a0e64ad8 SHA-256: b6f6eff517574639de83fcbe83f47b50ee72957a27a8dcab942cd0e1fce6d7ba
124 Risk Score

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 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://ttraff.link/pify?keyword=movie+tube+cc+apk+2018 In PDF document text
    • http://sofupebux.findahappybalance.com/uploads/1/3/0/9/130969600/9bfa78.pdfIn PDF document text
    • http://files.rishar.com/uploads/1/3/0/7/130738620/4b55b83.pdfIn PDF document text
    • http://gudes.cameronnazarene.org/uploads/1/3/1/3/131383476/bajamukujepumi.pdfIn PDF document text
    • http://files.northernbeacheshousewash.com/uploads/1/3/0/7/130775902/8609355.pdfIn PDF document text
    • https://site-1039505.mozfiles.com/files/1039505/wumetemim.pdfIn PDF document text
    • https://site-1037222.mozfiles.com/files/1037222/8869693454.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/a6668397-130d-49e7-9e49-40b607891307/kikujiwizojukajofixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6be765b8-942d-425e-bea6-0fb5439df9e3/kezibakitorajipotevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8618/3577/files/27043497011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1958/3138/files/37173433349.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7677/9174/files/google_classroom_sites.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/censecfor_operator_training_-_m9_service_pistol_course_nko_answers.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_off00006235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6235 5412 bytes
SHA-256: 1c61296e25537198e52fadfd5ac009ab71b4a368b70e91a819d932df8fa465d8
font_01_sfnt_off000074cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74CD 10032 bytes
SHA-256: 32be4e247c92f25a74838838abbb3a1ad1a7ad3c4c2d835d9e18b0e1d95f5c42