Malicious PDF — malware analysis report

Static analysis result for SHA-256 876ff79c7a3f1758…

MALICIOUS

PDF

36.2 KB Created: 2020-08-28 11:59:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 974251c46bc9b471bc56e36c66b69aaa SHA-1: ef74c3a982fee7358785c3e91d726296e972c34f SHA-256: 876ff79c7a3f1758abed87612bd704509bf5070ab6b4104ddafeb22fcd4dc611
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, indicating a link farm or SEO poisoning attempt. One prominent URL, 'https://ttraff.ru/pify?keyword=the+last+airbender+movie+download+in', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to the same search query, suggesting the PDF is designed to drive traffic to malicious or spam-related websites.

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=the+last+airbender+movie+download+in
    • http://files.poetic-healing.com/uploads/1/3/1/3/131378899/2901407.pdf
    • http://files.linhr.com/uploads/1/3/2/7/132712323/jidisubikeme-kalabapufibexu-zavosel-fajudivoziz.pdf
    • http://files.kelly-maryanski.com/uploads/1/3/1/4/131407901/zubeb_besaj.pdf
    • http://rawime.sheepprogram.com/uploads/1/3/0/7/130776334/1322385.pdf
    • http://files.rteamcaninecoaching.com/uploads/1/3/0/9/130969607/8f20e18a5fdf7ab.pdf
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/68986032742.pdf
    • https://cdn.shopify.com/s/files/1/0438/2159/6834/files/59609206004.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/rewimusepil.pdf
    • https://cdn.shopify.com/s/files/1/0430/1049/0519/files/60331512573.pdf
    • https://cdn.shopify.com/s/files/1/0437/1657/5383/files/cours_d_anglais_grammaire_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0459/8684/0743/files/agasobanuye_by_rocky_2019.pdf
    • https://cdn.shopify.com/s/files/1/0459/9057/6285/files/kurumuwit.pdf
    • https://cdn.shopify.com/s/files/1/0434/1583/0695/files/4863741804.pdf
    • https://cdn.shopify.com/s/files/1/0435/5050/7167/files/inventory_sheet_for_office_supplies.pdf
    • https://cdn.shopify.com/s/files/1/0427/3831/9527/files/prodigy_p2_brake_controller_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/7667/2918/files/dark_cloud_2_strategy_guide_download.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_off00004f22.bin
12295706de1b25a971c935e1782ec1b6a0d4cf9cc57e8e5aae39194fcc68ed14
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F22 5308 bytes
font_01_sfnt_off0000610a.bin
6b7d61490113129ed72259436a7f249b183241de84626d7c62524e4126eb66f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x610A 10144 bytes