Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd3e96f39ca3dd9f…

MALICIOUS

PDF

46.3 KB Created: 2020-08-27 22:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7c9cff615cabce84a1f35416803a746 SHA-1: 872b244594f49553f69d3e2fa806ca8f7d9b02a9 SHA-256: bd3e96f39ca3dd9f145a55042bd2dc501c835afd5c0b5238b343612fb8d8bf60
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 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 links, indicating a link farm. The primary malicious URL identified is https://ttraff.cc/pify?keyword=cadastro+nacional+de+informa%25C3%25A7%25C3%25B5es+sociais%2528+cnis+filiado, which is likely used to redirect users to a malicious site. 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=cadastro+nacional+de+informa%25C3%25A7%25C3%25B5es+sociais%2528+cnis+filiado
    • http://xigob.thefamilyfuckup.com/uploads/1/3/2/6/132680852/25b16ef9d.pdf
    • http://kupunisok.friendsofchristfoundation.org/uploads/1/3/1/4/131406519/kudonegofati_rutaf.pdf
    • http://files.centerfortransformativegrowth.com/uploads/1/3/0/7/130776350/7817477.pdf
    • https://cdn.shopify.com/s/files/1/0430/4352/0666/files/aadat_tu_meri_song_remix.pdf
    • https://cdn.shopify.com/s/files/1/0435/5339/0743/files/danogumed.pdf
    • https://cdn.shopify.com/s/files/1/0435/3500/7893/files/romavirevijikofamasobafip.pdf
    • https://cdn.shopify.com/s/files/1/0428/9436/0743/files/xaxaranibixoxufi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9968/files/grade_12_advanced_mathematics_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/84585582802.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/zowaguduxulul.pdf
    • https://cdn.shopify.com/s/files/1/0435/6302/4547/files/active_english_book_1.pdf
    • https://cdn.shopify.com/s/files/1/0432/6480/2982/files/25064455911.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_off00007143.bin
0455e1b6410019c46fa32aa37c02e4d8016b0a673e116c700eca552aa3383d93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7143 5552 bytes
font_01_sfnt_off00008384.bin
604eda685a3225ad3736c4ceab4a9405d284e0ae81e023d35886064e596c592d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8384 12520 bytes

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