Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e75c2a566f62cb4…

MALICIOUS

PDF

41.8 KB Created: 2020-11-04 03:14:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9dabe553e2595c9e824f52f4ddf90f30 SHA-1: 09862dace41d2db8c46b0a8b54194e03d6f7ea0a SHA-256: 5e75c2a566f62cb4ca1be33b14f889db4564194cca1d3641a1b89bd2f7b00cb7
102 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a link to a known malicious redirector, indicating an attempt to deliver a payload. The presence of a visual download button further supports a social engineering lure. The ML classifier also strongly flagged this PDF as malicious. The embedded URL 'https://ggtraff.ru/aws?keyword=monster+hunter+freedom+unite+apk+download' is the primary IOC for this attack.

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://ggtraff.ru/aws?keyword=monster+hunter+freedom+unite+apk+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4406514/normal_5f93b412ae083.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370778/normal_5f9403a58dc0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_5fa1fc36bec65.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/2f0f25eee28f32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418167/normal_5fa1eecb33463.pdfIn PDF document text
    • https://mijisurux.weebly.com/uploads/1/3/1/0/131070147/1814063.pdfIn PDF document text
    • https://lulitetuxopibol.weebly.com/uploads/1/3/1/1/131164377/1654521.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/f2054884-83e2-44b0-9444-92ccf64f37b7/66343353636.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/106c350f-1d9c-4111-be69-aaa815d55da3/holland_dozier_holland_the_complete_45s_collection.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ded33720-fdcd-4245-9492-0227e69502cd/practical_magic_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/195a9f87-8940-403f-9c1a-54bc1ebf0b16/buy_mapacho_cigars.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6db36583-51c4-445c-b87a-d5101ac260fa/87020213772.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9585f8e3-b005-4e33-8680-1246bce6a932/wauseon_schools_calendar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72939233-4e10-455b-a17b-a874c78ecc6d/92611710040.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_off0000638f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x638F 5440 bytes
SHA-256: ec3b96e4fc9ccb5deaf6f7173be7d1ec4669593cfcf7d74102a45171da48cc33
font_01_sfnt_off00007601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7601 10684 bytes
SHA-256: cc1490525933b9a53560e548c5276c9488745ee752b87baeb1243699bcddabbc

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