Malicious PDF — malware analysis report

Static analysis result for SHA-256 f57fdf08c8771967…

MALICIOUS

PDF

38.3 KB Created: 2020-11-04 16:05:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2b714700f7d5d829ae642b9a47ecbcd0 SHA-1: d813346eab20e3eb08b61f6b4cea17106d717d2c SHA-256: f57fdf08c8771967562e4dfde07d00817688974ae547a841435566f736015bf3
102 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=kingroot+apk+chromebook In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379048/normal_5f8e3fd29743d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374362/normal_5f89210cbaf3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384463/normal_5fa1721c13e17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382782/normal_5f94813ccc1e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408321/normal_5fa1c136a6156.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379363/normal_5f907a7f9b85a.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/jesidofefe/active_directory_replication_step_by_step.pdfIn PDF document text
    • https://s3.amazonaws.com/jevuxozazebazug/negekobadotilafodu.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/42606537146.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/74587720522.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/68686221451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/7781/8269/files/59320306235.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0659/3696/files/94518297726.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_off0000575e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x575E 5308 bytes
SHA-256: cb142cc0886a50bd60a3d166398556f28e7de40c1b3ec109b802c02a9481d999
font_01_sfnt_off0000694a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x694A 10688 bytes
SHA-256: a932bee051f9748bbbbe7357d979ec0e6726f88a83c90b274db36602d9cb65af

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