Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a57c643c9ebf7c9…

MALICIOUS

PDF

39.8 KB Created: 2020-10-27 14:25:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c95e078a0e754c494e0da5eb7c240758 SHA-1: 34a99d1face84a2ef42f069b93165242ada78ba3 SHA-256: 1a57c643c9ebf7c9106338a6cc9f9f77243039fb5f277b121390a7d95e28d4fb
94 Risk Score

Malware Insights

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

The PDF contains embedded URLs that point to known malicious redirector infrastructure, specifically 'https://gettraff.ru/strik?keyword=dark+souls+2+poison+arrows'. The ML classifier strongly flagged this PDF as malicious, and heuristic analysis identified it as a redirector link. The document body, though partially obfuscated, also contains this URL, suggesting a lure to external malicious content.

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/strik?keyword=dark+souls+2+poison+arrows In PDF document text
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/3177289.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/menedo-fodizelusekom.pdfIn PDF document text
    • https://tedumuwoke.weebly.com/uploads/1/3/1/3/131397970/9f161046b16677d.pdfIn PDF document text
    • https://sebonegipuwi.weebly.com/uploads/1/3/4/1/134108682/359687.pdfIn PDF document text
    • https://zazusixalug.weebly.com/uploads/1/3/4/4/134491239/3b035b2c40ba97.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/fasanag/2213278482.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22b4d6f8-2591-4802-a3c0-99400040c389/nubosofelefoweguzagajizib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1509809-2719-43b7-aae5-4e1a5fe98f2d/ginipikubunumur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1675f80d-7b3a-46b7-b45b-ee979773bafc/gozuwivakal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06d0efcd-45ed-4dc9-8439-1ebf0da600cd/zeponoralakisoperevili.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/californication_tablature.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/lista_de_aditivos_alimentares.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/lakop.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/gipalowoxeritasujagejova.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/lakadotajeniriribagot.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/74948118769.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50D7 5100 bytes
SHA-256: a9b0e69b542fe06050b5558817664fda3d13a755a2f4211572ff07cc047024a8
font_01_sfnt_off0000625d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625D 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off00006dc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC0 10776 bytes
SHA-256: ef0d809de105bb8b6816318e658d5fff31917b67abc324c325d6e373594485c8