Malicious PDF — malware analysis report

Static analysis result for SHA-256 29787a8aec759359…

MALICIOUS

PDF

40.6 KB Created: 2020-11-01 10:11:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5f16beb694f944fb9d632e9c41bf4dc8 SHA-1: 2c4b6eb9570dbb4f54575de47e6f4d21632994d4 SHA-256: 29787a8aec75935947bb626741f2447a487cc2daebe04a6ca6309d83ce2d3554
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. 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.
  • 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.
  • 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://ttraff.ru/123?keyword=girl+boxing+game+apk In PDF document text
    • https://vukuzimina.weebly.com/uploads/1/3/4/1/134109202/kuzomugazedoma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420468/normal_5f9bebf5911fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415783/normal_5f9533154f13b.pdfIn PDF document text
    • https://lonunibulitog.weebly.com/uploads/1/3/4/4/134498578/dedabagiban.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389107/normal_5f9e4aa4a00e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373271/normal_5f8fa17c7e43c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390661/normal_5f978b5b6fb7c.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/jifesu/rosogavabekopi.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/pogoduxodenagojuwabopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/1951/7334/files/27968850272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2621/9676/files/blacklist_app_download_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/lodixaturafukel.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/75239245916.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/54030854580.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_off00006109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6109 5264 bytes
SHA-256: 460b7cbb8ab50519ddcc46897c3aced201a920ee1b8d52679d186a04961398ec
font_01_sfnt_off000072e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72E3 10556 bytes
SHA-256: 83c83e885a33efdbd033075b1307e1700171233d1fc60ee3b28df0090b347ed9

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