Malicious PDF — malware analysis report

Static analysis result for SHA-256 898539531562fade…

MALICIOUS

PDF

73.8 KB Created: 2020-12-01 02:31:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 833f7677075f8339c264d8107b4c7e6f SHA-1: 6741e7d9951199af04f1c73d798d819e7e573d35 SHA-256: 898539531562fade26da7cdc8f910166d5b64061ce563e49ab5eb2b11162f7e1
214 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, and it contains a significant number of external links, many of which point to potentially malicious redirectors or link farms. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a link to 'traffine.ru', indicating a redirection to malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates the document is designed to host a large number of links, likely for SEO manipulation or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 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://traffine.ru/aws?utm_term=photo+blur+background+app+android In PDF document text
    • https://zukepuroxile.weebly.com/uploads/1/3/4/7/134746995/zugeve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426953/normal_5fb52b0e158e8.pdfIn PDF document text
    • https://guxedujigizos.weebly.com/uploads/1/3/4/7/134735137/6730637.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379498/normal_5f8b8f4b9becc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418381/normal_5fb697b389673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380384/normal_5f8b8f0ce1077.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381347/normal_5f99e178ea96d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f87701d5e3c4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4a172dd96f5918e4c55c/1606371864131/hermanas_en_ingles_y.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/muvezikavuginimoniba.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe29ec2dd96f5918b8274b/1606298093062/air_america_pilots.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/vinanufinudafobug.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/arizona_cardinals_schedule_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/2020_design_manufacturer_catalogs.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_off0000e3c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C4 5364 bytes
SHA-256: aaf73589ef8c0b67c1ccd0cdc72688f2f5bd5c973531c813efaffe82bf01d8de
font_01_sfnt_off0000f5f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F1 10628 bytes
SHA-256: 11b725f37f87bc9d2b794612c6607eaa70fa42d3972fce9751d46a05617512b7

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