Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8fee98df3e0ab02…

MALICIOUS

PDF

46.3 KB Created: 2020-08-09 17:09:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aaeae7e5aa53788d68168be7f5b19d7e SHA-1: 1bf6d1c098a4be12b4f455068621be2978749b3b SHA-256: a8fee98df3e0ab025d69bf534c8793605ded50057da3cc87c26d79fa3d62bb3b
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of embedded external PDF links, suggesting a link farm for SEO manipulation or phishing. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=cambio+climatico+efectos+pdf', which is likely used to redirect users to a malicious destination. The document body contains obfuscated text and embedded URLs, further supporting the malicious intent.

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.cc/pify?keyword=cambio+climatico+efectos+pdf
    • http://files.cmgworldwidefashionweeks.com/uploads/1/3/0/7/130776855/f2a97.pdf
    • http://files.twopsinapodohio.com/uploads/1/3/0/9/130969654/1318364.pdf
    • http://files.etbengineering.com/uploads/1/3/1/8/131857494/nodagu-gelakamu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2561/2450/files/76821521473.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/puvobufiruzepo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/iptables_block_ip.pdf
    • https://cdn.shopify.com/s/files/1/0431/9323/7665/files/american_english_and_british_english_words_that_are_different.pdf
    • https://cdn.shopify.com/s/files/1/0432/3108/4708/files/kufoluvonenanisolidelume.pdf
    • https://cdn.shopify.com/s/files/1/0434/0793/3603/files/79646365750.pdf
    • https://cdn.shopify.com/s/files/1/0432/2010/7428/files/boxogoja.pdf
    • https://cdn.shopify.com/s/files/1/0431/9854/6084/files/76886944692.pdf
    • https://cdn.shopify.com/s/files/1/0432/5287/5432/files/download_chemistry_textbook_for_secondary_school.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/
    • https://cdn.shopify.com/s/f

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000750d.bin
ce201865cad2e5673e12ff7011a081212886f66b55402ab21da6635ea6f1558b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x750D 5252 bytes
font_01_sfnt_off000086d2.bin
ef1067c3642527f3228dd6f4893861dfd7b607642d1af4461fee5fb87d37fc85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86D2 11008 bytes

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