Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c2875fbe6ac0bc…

MALICIOUS

PDF

37.3 KB Created: 2020-11-05 16:21:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8110276e37983b82dcb49fccde2bfa63 SHA-1: 246392c8d4f3fda3411833a9291de4e1d95867b2 SHA-256: 27c2875fbe6ac0bc08e10ae1690cc58732beb5d8e210e3e3ab57c9c4cd62c037
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://gettraff.ru/aws?keyword=craftsman+band+saw+guide+blocks, is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains this URL, suggesting it's the intended lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/aws?keyword=craftsman+band+saw+guide+blocks In PDF document text
    • https://zodebosamu.weebly.com/uploads/1/3/4/4/134444592/gabilulegatarazokavu.pdfIn PDF document text
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/xurukimajevod.pdfIn PDF document text
    • https://fikugutadopoxas.weebly.com/uploads/1/3/4/3/134340330/1a1a87d920c0c8a.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/tajimipojimo/centurion_boat_trailer_guide_covers.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/modelo_canvas_plantilla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/457379d0-1254-4671-ace2-efac2005b35d/71053147530.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/candlestick_patterns_for_intraday_trading.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05a5bb58-ff9a-4346-abda-97e82cc32b89/10479347767.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/fuforipixij.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/50682853255.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/chemistry_formulas_class_11.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_off0000516d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x516D 5540 bytes
SHA-256: 8bfb3d555ea17f373cdd2410ffa7241724dd5c466a30713e9c852b9fd83cca8e
font_01_sfnt_off00006446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6446 10564 bytes
SHA-256: 1ddc9be963469e177af218fa31eb789f8aead24fab3086207b27657306053414