Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4bd2bf80ac6c2be…

MALICIOUS

PDF

70.5 KB Created: 2020-12-27 12:01:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 33242f3d261966fb100f2d7aef8da09a SHA-1: 757a6dd797385f6b032afd7d62909d1f62afdee7 SHA-256: a4bd2bf80ac6c2be556578e1d3a900762674e6b7cd3d9fcf22fdc6dd24628e2c
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 Malicious Link

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It functions as a link farm, containing numerous embedded URLs that point to potentially malicious redirectors and disposable hosting sites. The primary URL identified, 'https://ggtraff.ru/strik?utm_term=vikings+game+stats+2020', is flagged as a known malicious redirector, indicating an attempt to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://ggtraff.ru/strik?utm_term=vikings+game+stats+2020 In PDF document text
    • https://kefepifumadig.weebly.com/uploads/1/3/1/3/131383651/zerixafoges_rudoxipikeves.pdfIn PDF document text
    • https://zeraxoxuret.weebly.com/uploads/1/3/4/6/134642117/xisigubakopozozur.pdfIn PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/4925581.pdfIn PDF document text
    • https://cdn.sqhk.co/solumapidema/Phflc1m/light_up_beer_pong_table_spencers.pdfIn PDF document text
    • https://cdn.sqhk.co/ponigubik/hcieqAn/809402630.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/sesakaf.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/hhicDKU/gubesawaf.pdfIn PDF document text
    • https://jisuzinux.weebly.com/uploads/1/3/4/6/134671095/moniniwosezug-zazepevaxopaf.pdfIn PDF document text
    • https://retujesa.weebly.com/uploads/1/3/4/5/134529196/6845fb.pdfIn PDF document text
    • https://letateworu.weebly.com/uploads/1/3/4/3/134365764/68f0e337.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/resixexi/ramafuperenusa.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/accelerated_testing_statistical_models_test_plans_and_data_analysis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC738 4860 bytes
SHA-256: 649194093ade19c0c1f61a8fbb12c159ca4e78c4f4157b28e7fd0afd5a0b33e0
font_01_sfnt_off0000d7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A2 12716 bytes
SHA-256: 8d729e76da686582d8dc59fd8ac3fd56c41bbe5f18102af22f1ec211c7ae2975
font_02_sfnt_off0000ff1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1B 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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