Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20b617decfdac6f…

MALICIOUS

PDF

42.2 KB Created: 2020-08-16 16:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03fa6cf273cd9c48169004235b728af7 SHA-1: a179f0a918887dffd968a12c4962aace495f0acf SHA-256: e20b617decfdac6f2bc98e4e1e74db0d065e84beafa68009803a9ffa7e4d3eb0
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as horoscope content, aiming to trick users into visiting a malicious URL. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms this, and the ML_NYX_PDF_MALICIOUS score indicates a high probability of malicious intent. The document body, though heavily obfuscated, contains the suspicious URL and other PDF links, suggesting a link farm or redirection tactic.

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.ru/pify?keyword=astrology+answers+aquarius+horoscope
    • http://luvufana.belleminks.com/uploads/1/3/1/3/131381489/fedov-vudagibot.pdf
    • http://binari.civil-engineering-architecture.com/uploads/1/3/0/8/130813108/vifimadidu_wituditobenes_genenipuj_paleluxogisuto.pdf
    • http://files.newworldtribe.us/uploads/1/3/1/8/131871537/foravifesori.pdf
    • http://files.hillszonechssa.asn.au/uploads/1/3/1/8/131857782/7243924.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2125/files/fejegujexira.pdf
    • https://cdn.shopify.com/s/files/1/0450/2565/6996/files/assam_rifles_recruitment_2020_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/6768/6556/files/2349926723.pdf
    • https://cdn.shopify.com/s/files/1/0431/5211/3820/files/dafaziridadu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0975/9640/files/cecad._cuestionario_educativo_clnico_ansiedad_y_depresin.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3992/files/lalenoluf.pdf
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/plant_diversity_lab_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/26337767284.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/38651498427.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_off00006693.bin
5d74ec8f537b4d391dc7ec92d3e1e6cca70031510bed54dcc014a5089940037a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6693 5504 bytes
font_01_sfnt_off00007959.bin
f8930b879194226101da2666d121f36a74548cb8cfa410f8d9d6fb19a7171f00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7959 10204 bytes

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