Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ec8dfa8d1d29745…

MALICIOUS

PDF

46.6 KB Created: 2020-10-28 21:19:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0e3826ec1e649bccc43e56a2b15376f4 SHA-1: 2b46bfcb33d7af4ac55b49081979a6329bb894ba SHA-256: 7ec8dfa8d1d2974541261c9a0103a7b874a8993db45ca3102846e7d717aa8c0b
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://ggtraff.ru/aws?keyword=traffic+rider+apk+unlimited+money In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374360/normal_5f8948e4665ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383806/normal_5f93ad86bc867.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367642/normal_5f89761a9dba4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f96b670e2716.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383689/normal_5f8d9c065b4ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381766/normal_5f97e9e124000.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388060/normal_5f90808b73903.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/1bf3f362-06aa-40d4-8579-2c4e5329711d/kixulumu.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/tagiwuzerifagelareso.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/vufikiwatirufurolimabibi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a4b8ff4-1cc8-44b4-8379-7fe7edd3bdc4/84348725609.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e276ff47-dd0e-43d0-8d76-a9b42635558e/kibip.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/49417683483.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50d71de0-aaf0-4397-80b1-cd946704dd40/89612189350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb9c0229-a7a6-484a-90b7-d43d96f7872b/parivuvavezazuzebosujozet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74bb251f-bb48-4572-8af7-ae58f72cbcd4/74232424260.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/98860208111.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95a0f314-2f72-4d19-9cfe-635d2cce5168/naburogoxomifusi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32209342-8d54-4e0a-b081-7c101f4950c0/70291715367.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fa996ab-1098-4a0f-bfd5-da4c68478ea7/rudaxiwe.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_off00007718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7718 5240 bytes
SHA-256: b9caedfc49aabb9940973a09a8ed8bf7dfde9c6347ab87e1b5b309642468d087
font_01_sfnt_off000088e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88E3 10640 bytes
SHA-256: 87a4e83383db01a7030fea7e8923df5e54364976b2602a20ed746c40fd383d22

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