Malicious PDF — malware analysis report

Static analysis result for SHA-256 c363a98fe57ca64d…

MALICIOUS

PDF

79.3 KB Created: 2020-11-07 08:00:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: da60383ec5fa0dece76ff52b5bc7d8cd SHA-1: 92989ce7eed947c42f522aaccc97cfcba25b43a2 SHA-256: c363a98fe57ca64da8ed247cc327c50d476a5892a42e7a944ba7c6375fa92724
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, traffking.ru, which is likely intended to lead the user to a malicious payload. The presence of a 'download button' heuristic and numerous external PDF links further suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/aws?keyword=usa+studies+weekly+answer+key In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f889ae039686.pdfIn PDF document text
    • https://kuvinonufero.weebly.com/uploads/1/3/4/3/134307364/vibosil.pdfIn PDF document text
    • https://tefizaset.weebly.com/uploads/1/3/4/5/134587169/18108d07de426.pdfIn PDF document text
    • https://nuwaruwavup.weebly.com/uploads/1/3/4/3/134362645/6755828.pdfIn PDF document text
    • https://depufavekozumel.weebly.com/uploads/1/3/4/0/134017714/7a9dd7eb.pdfIn PDF document text
    • https://dubasatipin.weebly.com/uploads/1/3/4/4/134459773/jodugog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425908/normal_5fa172a92df91.pdfIn PDF document text
    • https://vilemanunopabom.weebly.com/uploads/1/3/4/3/134317174/mojezin.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/6f7911a5-21f9-4322-b064-97baea700873/kevotivotuseputimozedivu.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/a_twist_in_time.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/972ae4a3-9a7d-4f9f-aab9-657b6e3ac6c4/kuvitudifibozixusomirefu.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/excess_reactant_analogy.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/69854158252.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/50354131912.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/69431776940.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_off0000fb4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4E 5068 bytes
SHA-256: d8c043c9b2692f6e1b8e0d5ee01c1359e1d6e02bbc490f28e462bab68caa70d8
font_01_sfnt_off00010cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB6 10456 bytes
SHA-256: 2df29d6accae1f76845b9bac0ca1f5dea871dc24d8978f93faa7d13ac7070f4d

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