Malicious PDF — malware analysis report

Static analysis result for SHA-256 982ecc60e24c4e57…

MALICIOUS

PDF

37.2 KB Created: 2020-11-03 20:51:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 03ac7303f2b5405c4d726bffa8f967c8 SHA-1: c7feaaf50735345198e22f75cb8bd96226227e82 SHA-256: 982ecc60e24c4e57b806f9b9ac1ebe378777c659e05798eabcdf89f62f31f811
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic identifying it as a redirector to malicious infrastructure. The primary malicious URL, https://cctraff.ru/aws?keyword=the+daniel+plan+pdf+download, is directly linked to a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to drive traffic to malicious sites under the guise of providing downloads.

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 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://cctraff.ru/aws?keyword=the+daniel+plan+pdf+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4451736/normal_5f9f5576ccdee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_5f87d4290cc7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f9cca581d4f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386363/normal_5f9c54e979658.pdfIn PDF document text
    • https://jasazifo.weebly.com/uploads/1/3/1/4/131437377/peburufapi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446511/normal_5fa12fb58ffb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f95b6fe10c7a.pdfIn PDF document text
    • https://voteriboxovoviv.weebly.com/uploads/1/3/4/3/134352377/kesevasigalufazexuw.pdfIn PDF document text
    • https://zoxaminajoge.weebly.com/uploads/1/3/1/6/131637873/9079236.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/1ff9d63f-98cd-43e4-9e4c-c0fc9456d1b1/59756464186.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/business_management_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdfe6122-14e3-49df-9d83-b90700c85ea5/pegizetipov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fb073c9-6708-494b-b94a-d1cb1cdd833f/fadun.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/pearson_study_guide_answers_for_michigan.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_off00005514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5514 4896 bytes
SHA-256: 57e3611ed8a8f2b2bfd9c00e2e8a6129d20ff6325936e63d892f2c7625e7e53c
font_01_sfnt_off000065cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65CC 9888 bytes
SHA-256: 51fa8879650fc645c0a86c8bc72b5107f052974581581a14c7e9ad07864a5b51

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