Malicious PDF — malware analysis report

Static analysis result for SHA-256 de1d16b92bf9c2bc…

MALICIOUS

PDF

50.6 KB Created: 2020-10-29 05:53:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 9c8b5341030940b157fabc420c28bf36 SHA-1: 36aaebb4c1e6afeaaf5f4ab95a01350257857b9e SHA-256: de1d16b92bf9c2bc310807d90a60823849f098e446524364bc54dfd7c6f37ba0
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to disposable hosting or known malicious redirectors. The primary malicious URL identified is https://cctraff.ru/strik?keyword=sony+vegas+apk, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a link farm designed to lure users to malicious sites. No scripts were extracted, but the structure and embedded links strongly indicate a phishing or malicious redirection attempt.

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/strik?keyword=sony+vegas+apk In PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/zivopikadawo-roberinipine-goneduxam-joxalitawip.pdfIn PDF document text
    • https://naletonuve.weebly.com/uploads/1/3/4/3/134381452/vowomusage.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/1438f0cc.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/nojof.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/vupagepotite.pdfIn PDF document text
    • https://tatunonomufobuf.weebly.com/uploads/1/3/4/3/134355176/2731591.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jijumupade/bohemian_rhapsody_piano_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4142/0979/files/manfaat_daun_pepaya_untuk_ayam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/807c6119-5d7f-4e0e-8e8d-032f2cf0131c/rekozezi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f29c3c4-a856-4997-bf0c-6fa8babaeec6/satepobinefabur.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/dozarezomixozabufukuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8969/3345/files/shrek_vs_thanos_who_would_win.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18e096c9-fb95-4787-84b8-1c7e42844c9c/lojexelu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4295/8231/files/wuzapemawuxijuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14c6b5ba-e123-4f42-b375-3bb90ccb992b/52298183054.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4390/3905/files/novovibivefovufevokegub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5da9ae5f-5493-48ad-92e0-639ee0e697d9/lipuxumumos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c88eeeda-ff95-4253-acbd-142ac029d68a/juegos_para_educacion_fisica_primaria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/4809/9751/files/the_room_2_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/93792868110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dade6bb8-b5db-4147-878c-50605788a1d2/bob_marley_greatest_hits_album_download_zip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e783c1e8-f1e6-41e3-b8dc-623f14b2fb88/b_xe_nc_ting_anh_l_g.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47d0f483-124f-498c-b75b-3e9cf9a7a3d9/1958648132.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/rules_for_balancing_chemical_equations.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/creative_thinking_for_dummies_download.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_off00008680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8680 5188 bytes
SHA-256: 783f9cc15906c41583c20e8c41b353eb2bac70c446ee835824d1278687f2041a
font_01_sfnt_off00009851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9851 10768 bytes
SHA-256: bc5fd97036df2d39f61d891466e8e62f31597e4e1b1f4d04397bdc9699f9f9bd

Open this report in the interactive analyzer, or submit your own file for analysis.