Malicious PDF — malware analysis report

Static analysis result for SHA-256 33cd0eca16e9b082…

MALICIOUS

PDF

42.2 KB Created: 2020-08-25 05:09:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3252391996d42d6a88bb3d4603c3f35 SHA-1: a32151537b9e285ae884c9a6927082ab20c1649e SHA-256: 33cd0eca16e9b0820203a1be4f638cd2baaf3e20e75da419e5731c9b2474ee25
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic identifying it as a link farm. Many of these links point to the 'ttraff.cc' redirector service, which is flagged as malicious. This suggests the document's primary purpose is to redirect users to malicious content through a chain of obfuscated links. The presence of 'javascript new formdata append' in the URL further indicates a potential JavaScript-based redirection or exploit.

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=javascript+new+formdata+append
    • http://gixemew.nemescreative.com/uploads/1/3/0/8/130814017/nokozowek.pdf
    • http://xenorez.motherwilsonswisewords.com/uploads/1/3/0/8/130874253/rerigit.pdf
    • https://cdn.shopify.com/s/files/1/0429/6281/3084/files/walewikufonufuguv.pdf
    • https://cdn.shopify.com/s/files/1/0432/2331/8683/files/13373565419.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/mulatizejozut.pdf
    • https://cdn.shopify.com/s/files/1/0430/1553/6793/files/xisutirefib.pdf
    • https://cdn.shopify.com/s/files/1/0446/3493/1363/files/the_advanced_guide_to_real_estate_investing_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/2025/4375/files/vebewowoniwagewibirip.pdf
    • https://cdn.shopify.com/s/files/1/0446/3493/1363/files/boulevard_of_broken_dreams_drum_tab.pdf
    • https://cdn.shopify.com/s/files/1/0432/6175/5547/files/24506944095.pdf
    • https://cdn.shopify.com/s/files/1/0440/3278/6597/files/classical_greek_alphabet.pdf
    • https://cdn.shopify.com/s/files/1/0434/0298/5626/files/free_scope_of_work_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9277/files/84260945064.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_off000058b8.bin
ac0d93bb232f45f205a19dd8da3ae73a97d24c52b3fdde265ce5bb3a2a5032cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58B8 5412 bytes
font_01_sfnt_off00006b1a.bin
f66ad0b4d92b38cae53fc26b74e1bc4c10534445d5b31fafbfb9f6f4f6b89644		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1A 15296 bytes

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