Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbbc95aaba633388…

MALICIOUS

PDF

79.5 KB Created: 2020-11-02 17:59:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6191a91c8b39110a2da253ec8f72a106 SHA-1: a7c3e09e9630b5b1eacfb368c2bdb4312a3639c1 SHA-256: bbbc95aaba6333886b7992f338ce85ff8dba2e4ae7f5477ae7329bcf8b3f7f73
202 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a lure. The presence of a 'download button' heuristic and a 'password archive lure' suggests a multi-stage attack where the user is prompted to download or decrypt a payload. The ML classifier strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/pify?keyword=dragon+ball+devolution+hacked In PDF document text
    • https://vosaxoro.weebly.com/uploads/1/3/4/4/134469305/7303657be4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380209/normal_5f8c16345501b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370303/normal_5f8c1d3943e2c.pdfIn PDF document text
    • https://katubebadidi.weebly.com/uploads/1/3/4/4/134474785/63eba5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376854/normal_5f92dfeb0f301.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369310/normal_5f88aad9c452d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407749/normal_5f9d0068429ad.pdfIn PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/wujago-ruxakudo.pdfIn PDF document text
    • https://tisatazufewuvo.weebly.com/uploads/1/3/1/1/131163687/relax-fosimok-zevupurow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388276/normal_5f8db3e6ce0d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f87424c7c269.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/45fdc847-d809-4d70-aced-59c99bb551dd/jekojebojuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c484c830-58a8-4f65-8fe6-9c82852e8889/27180865612.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_off0000f7b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B0 5288 bytes
SHA-256: 2783d76e5c9d08990d09d3b06bbb1912e84d649d21c02bb5a5399bf64954768d
font_01_sfnt_off000109af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AF 11632 bytes
SHA-256: 22e4d3cc9f056180845feaa607df9a32c794cadb85cdc132a0d19a1d90300164

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