Malicious PDF — malware analysis report

Static analysis result for SHA-256 b458e0be304a2fe6…

MALICIOUS

PDF

34.6 KB Created: 2020-08-28 15:51:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98539749f71d5919c9963f7bbbd0e7f1 SHA-1: 52404480b84b3b58073bee43c5f8e91cfba35ad0 SHA-256: b458e0be304a2fe6f056776ecdf8a0e8a2e5bda11d25ea534452346f47df52c9
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://ttraff.club/pify?keyword=new+holland+tc45da. While no scripts were extracted, the sheer volume of embedded links points to a delivery mechanism designed to either host further malicious content or to artificially inflate search engine rankings for specific terms.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.club/pify?keyword=new+holland+tc45da
    • http://gorogu.hoowutwenphoto.com/uploads/1/3/0/7/130775511/d6dda1.pdf
    • http://files.steps-of-faith.com/uploads/1/3/1/4/131413678/c91818dc33719.pdf
    • http://files.percivaleast.com/uploads/1/3/1/3/131379296/9317646.pdf
    • http://files.authorjdnelson.com/uploads/1/3/1/1/131163782/76b814.pdf
    • http://files.worldyouthpeaceforum.com/uploads/1/3/1/3/131380177/d09f12a6bbd5b7d.pdf
    • https://cdn.shopify.com/s/files/1/0450/0570/1284/files/ap_biology_campbell_7th_edition_test_bank.pdf
    • https://cdn.shopify.com/s/files/1/0438/2490/6397/files/zababoxuxiwat.pdf
    • https://cdn.shopify.com/s/files/1/0430/1901/0201/files/basic_accounting_principles_uk.pdf
    • https://cdn.shopify.com/s/files/1/0435/2491/5359/files/basic_russian.pdf
    • https://cdn.shopify.com/s/files/1/0431/6908/7642/files/russian_beginner_vocabulary.pdf
    • https://cdn.shopify.com/s/files/1/0437/0939/9193/files/temizlik_maddeleri_kimya_10_snf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/giratajolexodomofavewolov.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/80339395992.pdf
    • https://cdn.shopify.com/s/files/1/0429/0589/5075/files/fifazapazojufoxugatekireb.pdf
    • https://cdn.shopify.com/s/files/1/0435/9595/6386/files/baxodolonogi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8921/6163/files/wakeze.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004935.bin
1708e0655a90c8a3b1fac72bc6ce6f7a492213ccaa1e612d07dcac3a342ebfce
pdf-font-stream PDF embedded font (sfnt) at offset 0x4935 5028 bytes
font_01_sfnt_off00005a69.bin
8763b51321a43736b75ed44e5262290364d960de03bf4922175190b63d438180
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A69 10328 bytes