Malicious PDF — malware analysis report

Static analysis result for SHA-256 feb281bfd7cf8eaf…

MALICIOUS

PDF

44.0 KB Created: 2020-08-02 16:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f88f777131cdf5049d47fffa99f83a7 SHA-1: 7974a1eba017adebb1e7af5a7e29346c8e6c4824 SHA-256: feb281bfd7cf8eafb35a16449ec98747c6ba04ea5315a63f31e7067ff09dc245
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 one identified as a malicious redirector. The document body, though heavily obfuscated, contains references to URLs that are likely part of a link farm designed to distribute malicious content. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users to malicious sites via these links.

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=god+of+war%253A+betrayal
    • http://files.nadirbouhmouch.com/uploads/1/3/0/9/130969312/3360884.pdf
    • http://files.ethnotricity.org/uploads/1/3/0/9/130969209/sukexivomukuresilax.pdf
    • http://jimov.childrenareourspecialty.com/uploads/1/3/1/8/131856476/toxoz.pdf
    • https://cdn.shopify.com/s/files/1/0427/8288/4006/files/sozojejiwovoverodemafodon.pdf
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/tekunufubawetofil.pdf
    • https://cdn.shopify.com/s/files/1/0429/3849/9235/files/nejolenivelive.pdf
    • https://cdn.shopify.com/s/files/1/0432/6067/4198/files/pibodemepik.pdf
    • https://cdn.shopify.com/s/files/1/0439/2468/4968/files/50325588509.pdf
    • https://cdn.shopify.com/s/files/1/0429/3407/5558/files/9179735261.pdf
    • https://cdn.shopify.com/s/files/1/0440/1342/0702/files/jupofixidasojose.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/puwojadudabub.pdf
    • https://cdn.shopify.com/s/files/1/0433/9027/1642/files/nufabiwun.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/napeji.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89120948070.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/49966804356.pdf
    • https://cdn.shopify.com/s/files/1/0432/7754/9726/files/kanulobesugutefexav.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_off00006ecf.bin
c8d8d63fa6345ff9ca0d9c91da2fe8806f23d9194b48a5116b5ece09cba7edf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECF 5136 bytes
font_01_sfnt_off00008075.bin
7f6bdffa99e5668edf864bd4d41fe5542c814e845492d0b8d26df1ef09455122		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8075 10088 bytes

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