Malicious PDF — malware analysis report

Static analysis result for SHA-256 897f96b4ee863710…

MALICIOUS

PDF

44.3 KB Created: 2020-10-30 07:07:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: cbb1eb43b6195e84e30da2aaccbb30a8 SHA-1: d9259fb321cf24180dbbe0684d267b01ef1a9106 SHA-256: 897f96b4ee863710eacecee02da6c58b86b9d98e7f082aa615f7d20da8373870
124 Risk Score

Malware Insights

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

This PDF document contains embedded links that redirect to malicious infrastructure, specifically identified by the 'ttraff.ru' domain. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to lure users to a potentially harmful site. The ML classifier strongly indicated maliciousness, supporting the heuristic findings.

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://ttraff.ru/pify?keyword=george+eads+high+school In PDF document text
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/6918844.pdfIn PDF document text
    • https://kowabimope.weebly.com/uploads/1/3/4/3/134359524/5834733.pdfIn PDF document text
    • https://lubukapilibuvi.weebly.com/uploads/1/3/4/0/134095968/gawobojodiriwoz-kezezi-sogipexi-soxibifasafeg.pdfIn PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/c02036eab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378628/normal_5f8b3f766cfa8.pdfIn PDF document text
    • https://renesixedobalew.weebly.com/uploads/1/3/0/9/130969137/baxozisofis_jimojakiwa_muxepimima.pdfIn PDF document text
    • https://xelenupexom.weebly.com/uploads/1/3/4/4/134480667/lexiwomibozoj_wuzavovokor_gazawito_labezataxow.pdfIn PDF document text
    • https://vodiwisilob.weebly.com/uploads/1/3/2/6/132681054/gedijomojebapigit.pdfIn PDF document text
    • https://josugonu.weebly.com/uploads/1/3/4/4/134488469/6118867.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c426b0d-2c5b-4a02-85c4-2b86f5c4a525/vogefugomifivi.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/bizikedekalavaralopi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9234/3459/files/29391308697.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_off000070af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70AF 5232 bytes
SHA-256: de6e5cc3250efdb42d11e6af0a82a6ba50d909e7dbf62998e8bd821cb07e4f60
font_01_sfnt_off00008276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8276 9964 bytes
SHA-256: 10f94c1b5369e6a1506c2ea1de9a6168180ae728d73232a4071bf6e785b5b07a

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