Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba82eec7b05fec14…

MALICIOUS

PDF

45.0 KB Created: 2020-11-06 20:09:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 51eb1403171287c724a78c00e432aea7 SHA-1: b236e4a66900d7bc0c351e993c485e326d28a23b SHA-256: ba82eec7b05fec14b8e9df98ef3c0c4cb3f407a9cd016744edbbf2e1192079f2
96 Risk Score

Malware Insights

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

The PDF document contains a heuristic firing for a link farm, indicating it hosts numerous external links. One prominent URL, 'https://trafffe.ru/aws?keyword=library+of+genesis', is directly embedded and suggests a lure. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the PDF structure and embedded links point towards an attempt to redirect users to potentially malicious or SEO-abusing content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/aws?keyword=library+of+genesis PDF link annotation
    • https://dedaruxije.weebly.com/uploads/1/3/4/4/134455514/f7d0f4d.pdfIn PDF document text
    • https://lulitetuxopibol.weebly.com/uploads/1/3/1/1/131164377/wekudusoxakimujere.pdfIn PDF document text
    • https://jorimedazaget.weebly.com/uploads/1/3/0/7/130738946/6697967.pdfIn PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/ad035489b3d.pdfIn PDF document text
    • https://gavawujag.weebly.com/uploads/1/3/4/3/134370084/91e262127eb36.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/2075341.pdfIn PDF document text
    • https://xaniwunedevivat.weebly.com/uploads/1/3/4/4/134470123/lovowivewiv-petupemubiwod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/legenapi/bibikiwabegodamo.pdfIn PDF document text
    • https://s3.amazonaws.com/kepevipawit/labview_vi_package_manager.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/71714333220.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/floyd_mayweather_sr_boxing_record.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/28822867229.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/bishop_brady_plus_portals.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_off00006c59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C59 5084 bytes
SHA-256: 54ffcfdf7ade1c0ec22d5cbb026ebfb9a7c13966298dca4de13b0725e204bb19
font_01_sfnt_off00007dc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC9 13080 bytes
SHA-256: 47c7f27bb094ea57fa2dfe8392aeee4c6ed05bc07a87067c6093130eb12f69ef