Malicious PDF — malware analysis report

Static analysis result for SHA-256 c10e422c1c0f89ee…

MALICIOUS

PDF

32.6 KB Created: 2020-08-01 11:35:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af79ed59a3c91a7c5f99e478853d288b SHA-1: 2456a6e1cdc228bd500eeb71325bead8c120b026 SHA-256: c10e422c1c0f89eee48baa89699aa1a37947cab20e9c09e8eb577f76b5fe2985
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, a technique often used to create SEO link farms for malicious purposes. One of the primary links directs to a known malicious redirector, 'ttraff.cc', which is likely intended to lead the user to a malicious payload or phishing site. The ML classifier also strongly indicated maliciousness.

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=wii+u+usb+helper+title+key
    • http://files.squirrelimprov.com/uploads/1/3/1/3/131379678/442570.pdf
    • http://files.gradgov.com/uploads/1/3/0/7/130775062/noxideborab.pdf
    • http://files.calvarybaptistwinamac.org/uploads/1/3/2/6/132682930/1c76086bf3c78d6.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0300/files/4818986241.pdf
    • https://cdn.shopify.com/s/files/1/0439/6436/7006/files/burunep.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/rilamojef.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/gupasomowasaku.pdf
    • https://cdn.shopify.com/s/files/1/0430/9316/4181/files/disusewutenewawulutepeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/1357/0709/files/68498558535.pdf
    • https://cdn.shopify.com/s/files/1/0432/2007/4657/files/nevopak.pdf
    • https://cdn.shopify.com/s/files/1/0437/6294/2106/files/89164516795.pdf
    • https://cdn.shopify.com/s/files/1/0435/2825/7685/files/berofir.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/voboxebifipodorevide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63529720688.pdf
    • https://cdn.shopify.com/s/files/1/0436/5392/2981/files/32368323319.pdf
    • https://cdn.shopify.com/s/files/1/0433/8325/9301/files/97698412964.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/nividox.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_off0000452e.bin
03cde37eb82f937aa0b952979671146c411c08b3433f1c7ea00391e9dab11490		 pdf-font-stream PDF embedded font (sfnt) at offset 0x452E 5016 bytes
font_01_sfnt_off00005646.bin
b5f3ef9b0d368570d8ee96f00a5670292f3cc9988e936975af64d2d6217f1386		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5646 9212 bytes

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