Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8697aeebfb3cd6f…

MALICIOUS

PDF

68.8 KB Created: 2020-11-02 20:11:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: bc37c9230e7e6c6dd1e9e4448512cf3d SHA-1: e08a617b69477411511dbd81fe27e4907011c24b SHA-256: b8697aeebfb3cd6f9fc706e94f0c77b3d31582876797faa47f04e02cb8b7e437
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links, with a critical heuristic identifying it as a redirector to malicious infrastructure. The primary malicious URL, https://gettraff.ru/aws?keyword=becoming+nicole+book+pdf, is presented within the document body and is likely used to redirect users to a phishing site or download further malicious content. The presence of a large number of external PDF links suggests a link farm used for SEO poisoning or to obscure the true malicious destination.

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://gettraff.ru/aws?keyword=becoming+nicole+book+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370056/normal_5f9d734da0714.pdfIn PDF document text
    • https://fupopafesuz.weebly.com/uploads/1/3/4/4/134443157/2428733.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413223/normal_5f97377c10dc1.pdfIn PDF document text
    • https://zazukorowoko.weebly.com/uploads/1/3/4/4/134488568/zipuruwivanov.pdfIn PDF document text
    • https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/melopon_misuvu_bibivi_dekedudogadoj.pdfIn PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/bfb9a2744d.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/periger-xutedebotadalaw-gevazud-dogosibituworev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384464/normal_5f9a3ba12d56a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5723/1525/files/memanor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0972/7912/files/diablo_3_best_demon_hunter_build_season_21.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2962/7548/files/2501024483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5683/0366/files/32757040626.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/sawupepanaginirega.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_off0000cfb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB1 5244 bytes
SHA-256: 2e0861b10ea9b94ae15c4e65b02131a673b05a0a79b53216e4143e7b51bb2df7
font_01_sfnt_off0000e180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE180 10816 bytes
SHA-256: 792875404dfb8237c932fed6aee08a72ebec8535d4478a32878612b52bc2f323

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