Malicious PDF — malware analysis report

Static analysis result for SHA-256 974d22705935937d…

MALICIOUS

PDF

33.4 KB Created: 2020-10-07 14:15:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0d3a1892a842e5aab135024b2d018b60 SHA-1: 38b53e16f65ecde26006a6ca29cab8da21af783c SHA-256: 974d22705935937dd89547bb05f1273593f0470201a0391e1d144d8a57866b23
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

This PDF document functions as a link farm, directing users to numerous disposable domains. One of these domains, 'gettraff.ru', is identified as a known malicious redirector, indicating a high likelihood of leading users to malicious content or phishing sites. The ML classifier strongly supports the malicious verdict.

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 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://gettraff.ru/strik?keyword=para+perto+de+ti+senhor+eu+quero+est In PDF document text
    • https://site-1036951.mozfiles.com/files/1036951/21299255718.pdfIn PDF document text
    • https://site-1036819.mozfiles.com/files/1036819/jedim.pdfIn PDF document text
    • https://site-1038879.mozfiles.com/files/1038879/pujijabonasosarepu.pdfIn PDF document text
    • https://site-1043662.mozfiles.com/files/1043662/solejamudibe.pdfIn PDF document text
    • https://site-1038526.mozfiles.com/files/1038526/bikal.pdfIn PDF document text
    • http://files.togetherwalking.com/uploads/1/3/1/3/131398094/23e8e9.pdfIn PDF document text
    • http://pakili.christianlitforafrica.org/uploads/1/3/1/1/131164250/9240955.pdfIn PDF document text
    • http://bewutoguz.abstractmachina.com/uploads/1/3/1/4/131453194/1959957.pdfIn PDF document text
    • http://zotow.mrscooke.com/uploads/1/3/1/6/131606260/8803219.pdfIn PDF document text
    • http://dezejikib.maverickwellnessboston.com/uploads/1/3/1/3/131380284/f4242a9e29e.pdfIn PDF document text
    • http://files.benwahrlebaseballparks.com/uploads/1/3/1/4/131453464/a1801579dc7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0470/7491/files/47282398946.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_off00004450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4450 5140 bytes
SHA-256: 830b8d7a7a1c2b902c3500dab7ae112989702d28e57c8f89bef9b76225a2881e
font_01_sfnt_off000055c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55C3 10628 bytes
SHA-256: 2736596c62858e1d9271b1c2ccb94ad00baf1ccaa6ab705c6ec7f2be84d1d98c

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