Malicious PDF — malware analysis report

Static analysis result for SHA-256 4717799416835921…

MALICIOUS

PDF

81.1 KB Created: 2021-01-17 13:00:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 429d460b20f0cc63040f27179d019aec SHA-1: f46f637aa8a8eb4fef567dcd980367018a63242e SHA-256: 471779941683592140cfdba454a5aa4f54ed2d3b50e1fc6bcdd925d56067dcbb
184 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, with one specifically pointing to 'traffine.ru', identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Aggiornamento android smart tv akai', suggesting a lure for users seeking device updates. The presence of a malicious redirector link and the nature of the lure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/aws?utm_term=aggiornamento+android+smart+tv+akai In PDF document text
    • https://cdn-cms.f-static.net/uploads/4416806/normal_5f9875883657a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498376/normal_5fe608211ed96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371536/normal_5f8c0db0bd7d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f88ee2b56210.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368493/normal_5f8bdc1759dcf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485576/normal_5fef0a2c3be0b.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/aide_memoire_technique_tuyauterie.pdfIn PDF document text
    • http://misibinebob.epizy.com/alternative_answers_to_thank_you.pdfIn PDF document text
    • http://zikukoji.epizy.com/88920478832.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/41550525747.pdfIn PDF document text
    • http://godolefimew.epizy.com/70588476406.pdfIn PDF document text
    • http://dobupefibukin.epizy.com/lathrop_state_park_fishing_report.pdfIn PDF document text
    • http://bibobega.epizy.com/digital_marketing_plan_template_free.pdfIn PDF document text
    • http://buwumipulufi.epizy.com/18560812751.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/zisof.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_off0000ff38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF38 5228 bytes
SHA-256: 3f8abb3b02f955be77e410744ad7b59bf99670d31cfecfff8ea355195023a394
font_01_sfnt_off000110f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F7 11108 bytes
SHA-256: 9c16a3b98faa2a9e9c272f1763fecbbec896b1f44ed50348dc115a3ec512a87a

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