Malicious PDF — malware analysis report

Static analysis result for SHA-256 b59d9ed93ee0ff0f…

MALICIOUS

PDF

41.6 KB Created: 2020-10-31 16:38:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 481f037fcce6cc645a23a83bcde05f1c SHA-1: f23b73263bc5feb6d027cf8dffd31742caf18778 SHA-256: b59d9ed93ee0ff0f09551ce68d47673b8388436ef3f00351a7ea92bad423a94b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier and contains numerous embedded URLs. One URL, 'https://gettraff.ru/wb?keyword=personal%20development%20questions%20and%20answers%20pdf', is identified as a known malicious redirector. The document also exhibits characteristics of a PDF link farm, with a high volume of external links likely intended for SEO manipulation or to distribute further malicious content.

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://gettraff.ru/wb?keyword=personal%20development%20questions%20and%20answers%20pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385012/normal_5f8e8e0794377.pdfIn PDF document text
    • https://lezivefa.weebly.com/uploads/1/3/4/4/134458465/6319770.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369183/normal_5f88b1d70d035.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368489/normal_5f8976a7c89e9.pdfIn PDF document text
    • https://vujuzujotug.weebly.com/uploads/1/3/4/4/134478410/sizak-kolujag-jefitovozog-dunidalo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368224/normal_5f87c447cdcc8.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/lovovukibejuvomuzagu.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/1d7bf174-628f-4c39-95fd-c7d92249b7e0/punagisaruze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d265695a-85cb-4698-81fe-72d2b5faedb8/36369259966.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/406e6c48-fb6b-436f-9da2-3ef5e32b87a6/46035460953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3033/2060/files/zojumexajit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0f117bf-8ae7-4f7d-b2c3-627aeee2bb82/timatojuxozoralekin.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_off00006358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6358 5464 bytes
SHA-256: 5ef3037c6ddb145d24263d0d8ffec7c86cf7539a2783a9ac3207422ca630c9ee
font_01_sfnt_off000075ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75EE 10276 bytes
SHA-256: b93f0d29eaee298019da58cc3623498b0001d00d91391c206e11a7d4c99436c7

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