Malicious PDF — malware analysis report

Static analysis result for SHA-256 20e4f9ce6654331f…

MALICIOUS

PDF

41.6 KB Created: 2020-08-02 19:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01c76cb5425531a851abae6ea48019fc SHA-1: a7440030e78ca4b6dcf5402ee7a8f2fa2cd15535 SHA-256: 20e4f9ce6654331fb3b05190c51bdbaea8e79233d2905c9c52f58095c5341e31
150 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous external PDFs, with one specific URL identified as a malicious redirector. The document body, though heavily obfuscated, contains the target URL. This suggests a phishing or scam attempt designed to redirect users to malicious content. No scripts were extracted, limiting the analysis of dynamic behaviors.

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.ru/pify?keyword=kenmore+self+cleaning+oven
    • http://files.caribbeandreamsconcert.com/uploads/1/3/1/8/131856492/butadano-ketuzupifil-zovujovolow-zadudobax.pdf
    • http://files.plantwisdomgardencenter.com/uploads/1/3/2/3/132303406/ratorumatulag.pdf
    • http://files.whitehorsevenue.com/uploads/1/3/1/1/131164002/2200376.pdf
    • http://files.ashmancini.com/uploads/1/3/0/8/130874381/52f36bb.pdf
    • https://cdn.shopify.com/s/files/1/0430/0744/3103/files/33647075802.pdf
    • https://cdn.shopify.com/s/files/1/0440/8298/7158/files/free_nexus_expansions.pdf
    • https://cdn.shopify.com/s/files/1/0431/1118/6588/files/dirijenuwexaravajekumo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/45238625765.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/favisenikag.pdf
    • https://cdn.shopify.com/s/files/1/0437/2201/4870/files/bixuxisatapuwetulufapuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/6529/5526/files/43145640252.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/senizinidakuxivopoviwig.pdf
    • https://cdn.shopify.com/s/files/1/0433/6055/1070/files/23137379545.pdf
    • https://cdn.shopify.com/s/files/1/0428/2250/0518/files/54065642952.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/55864873889.pdf
    • https://cdn.shopify.com/s/files/1/0428/8613/5961/files/viroluzufisekofago.pdf
    • https://cdn.shopify.com/s/files/1/0433/9574/3907/files/62311983736.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_off00006653.bin
534f1995373ba24660524cbddeb0aeacb60e31e77ad5dfd1df3cf38498557470		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6653 5228 bytes
font_01_sfnt_off0000781b.bin
9fe688588fbdfa0abfecc22db30bf1c904c07e7c059c7aa482d3ebf2de64a32d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x781B 9800 bytes

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