Malicious PDF — malware analysis report

Static analysis result for SHA-256 90d5151ebb0feb40…

MALICIOUS

PDF

38.8 KB Created: 2020-08-02 14:30:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad666f12c2f714e94a5a0bf0497c1a41 SHA-1: 956aaf8712eb50cb095af9e512a15fdc1dbd4531 SHA-256: 90d5151ebb0feb40341a3319d9dc6d461f8807ff83acf995e9d8fe357efe8b91
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a high number of embedded links to other PDF files, a technique often used for SEO manipulation or to host malicious content. One of the primary links points to a known malicious redirector infrastructure at 'ttraff.com'. The document body contains garbled text but also includes the string 'discord bot js', suggesting a potential lure or theme for the malicious content. No scripts were extracted, but the overall structure and linked URLs indicate a malicious distribution or redirection attempt.

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.com/pify?keyword=discord+bot+js
    • http://files.kannwoodtimberworks.com/uploads/1/3/0/8/130814861/sewobixono_witajufikul_wikuxale.pdf
    • http://files.ivyheightschurch.org/uploads/1/3/1/1/131164250/d0b68.pdf
    • http://files.cathysdoodlesandpoodles.com/uploads/1/3/0/7/130740252/xexizifasamus-zojotegedok-pipalep.pdf
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/46049890673.pdf
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/8239579851.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8992/files/witurovusobubopev.pdf
    • https://cdn.shopify.com/s/files/1/0430/3116/7137/files/1702154056.pdf
    • https://cdn.shopify.com/s/files/1/0429/6058/4870/files/bebulifidosatozajoxadel.pdf
    • https://cdn.shopify.com/s/files/1/0437/7749/1105/files/pizenepuwumaba.pdf
    • https://cdn.shopify.com/s/files/1/0432/5395/6758/files/60881010730.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4240/files/kokuv.pdf
    • https://cdn.shopify.com/s/files/1/0438/3539/2150/files/47863918520.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_off00004ffe.bin
df1d30f419eb8222e5d279300542bcab6860e4fa084e6edaab566ade114bd785		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FFE 4908 bytes
font_01_sfnt_off000060c3.bin
31606035da41fc567c31b646cdafac8954860331b1079557f048608145464dc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60C3 14052 bytes

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