Malicious PDF — malware analysis report

Static analysis result for SHA-256 9df4707840868bce…

MALICIOUS

PDF

37.9 KB Created: 2020-11-03 07:17:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ac7816ab394f2401f6b8c8ace858491a SHA-1: 3c190605a8965d37b2c2195710cd67467402bbed SHA-256: 9df4707840868bcea522135ce7c620ab361401c3cc1569535dbbfd1eba5764d5
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a large number of embedded URLs, many of which point to external PDFs. One of the primary URLs, https://ggtraff.ru/123?keyword=nixfix+website+for+stevie+nicks, is identified as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting a link farm or SEO manipulation tactic to distribute malicious content or redirect users to phishing sites.

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://ggtraff.ru/123?keyword=nixfix+website+for+stevie+nicks In PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/a1d0b0c.pdfIn PDF document text
    • https://xabomipa.weebly.com/uploads/1/3/4/4/134484571/kofonifabudumad_moxemelexukud_dofajixip_dosijosi.pdfIn PDF document text
    • https://lepitosamodovax.weebly.com/uploads/1/3/4/3/134335454/zakit.pdfIn PDF document text
    • https://bujupovira.weebly.com/uploads/1/3/4/4/134472582/tojewagixudaba_rubafil_nufadatekan_nisivibidizet.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/1/0484/0878/9150/files/26492303318.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/nvsp_form_8_hindi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3730/7292/files/bams_3rd_year_syllabus_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/43276425908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/9781/4698/files/kathy_schrock_guide_to_everything.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5440/7578/files/biografia_de_fray_bernardino_de_sahagun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9560/3862/files/52250443699.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5037/6099/files/muggles_guide_to_harry_potter.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_off00005438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5438 5024 bytes
SHA-256: c89181f7256b178188e896b8fb689a94b2597763c29f218f5e972fd0ed5dc81a
font_01_sfnt_off0000658e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x658E 10976 bytes
SHA-256: 6b0ecaedd75ddded76b91e09451954f0b9b632f9f8151e5a946bdaef33a1f2d8

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