Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fec8692f6e9190c…

MALICIOUS

PDF

43.4 KB Created: 2020-10-26 14:44:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e47b4daab91d06b32f5eb4edab409329 SHA-1: d36f2092002ba184e151b7bd08b839b61a34fc0d SHA-256: 9fec8692f6e9190cd9eb3022e6d881ff378d71855358189aad4c336174a28649
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, cctraff.ru, which is likely used to funnel victims to phishing sites or malware downloads. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and the presence of numerous other links to PDFs on S3 buckets suggests a link farm or SEO poisoning attempt to improve search engine ranking for malicious content. The ML classifier also strongly indicated maliciousness.

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://cctraff.ru/strik?keyword=saxon+math+course+1+tests In PDF document text
    • https://fulojozizarotuv.weebly.com/uploads/1/3/4/3/134318677/fulufevabuvoku.pdfIn PDF document text
    • https://nimorozidu.weebly.com/uploads/1/3/4/3/134373006/tovafide.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/dukajevo/kovexaxoputonejo.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/zomobekefafu.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/apparent_digestibility.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/business_goals_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/10933966445.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/barmetro_de_las_amricas_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/8343502528.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/sadolunolik.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/hebrew-_biblia_hebraica_stuttgartensia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2474/0252/files/bw_dm7_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0876/4321/files/itouch_smart_watch_3260_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3841/6801/files/california_department_of_housing_and_community_development.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ee59988-18a6-48ce-afa1-52ac290b7a8b/73532181905.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad0dbe33-f8b6-4a20-a258-478cb520e865/dispara_yo_ya_estoy_muerto_personajes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a22722d-5820-459e-9d38-65fb13aaf317/kagagibapikevudaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc3af33b-6276-4407-a917-f6d3529834bc/naydra_horn_farm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fe55fc9-73c8-4e61-9515-4bc4eafe7a4e/farsa_seme_metinler.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4333/2000/files/ssc_2020_results_with_marks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2072/4635/files/aircraft_structures_for_engineering_students_megson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6989/8909/files/conformity_and_conflict_14th_edition_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4247/8501/files/9784901795.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_off000067d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67D0 5232 bytes
SHA-256: d0a387af5a20d8937a5f63bad6f6510ef28bc276f19407abf37d18dfdd064b47
font_01_sfnt_off0000796b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x796B 11716 bytes
SHA-256: dbe67a0f67a40b8ca7b9aae5b4176e79bb08107b3a33dc4576e89c49667abe3e

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