Malicious PDF — malware analysis report

Static analysis result for SHA-256 3daad8e20cf0470d…

MALICIOUS

PDF

33.8 KB Created: 2020-08-04 10:49:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be0211ae9cce956f3ef872df445a0552 SHA-1: f5d3e847d55b5587208b08f173883c80732d19ea SHA-256: 3daad8e20cf0470d7c660847b85e007541eb11bf2cb4986d22eb8514bb204b72
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that points to a redirector service. This suggests the primary purpose is to redirect users to malicious content, potentially for phishing or malware distribution. No scripts were extracted, limiting the analysis of specific execution 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.com/pify?keyword=benedetta+rossi+libri+pdf
    • http://files.mallencunningham.com/uploads/1/3/1/1/131164124/4a24b61272b.pdf
    • http://files.toadstoolshadow.com/uploads/1/3/2/7/132740620/bipuzev.pdf
    • http://files.feliciasmusicstudio.com/uploads/1/3/1/4/131455463/gukewipose.pdf
    • http://xotikuto.brainylife.org/uploads/1/3/1/3/131378776/879cfb7f.pdf
    • http://wawebed.doulabianca.com/uploads/1/3/0/8/130814397/5d8db747b.pdf
    • https://cdn.shopify.com/s/files/1/0434/5298/9607/files/zobazixezadi.pdf
    • https://cdn.shopify.com/s/files/1/0440/4399/3238/files/sevigajebiwizerefujul.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8392/files/metujegazuvedupebuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/bikanonulosiragewin.pdf
    • https://cdn.shopify.com/s/files/1/0432/1122/7300/files/50292491897.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39720928980.pdf
    • https://cdn.shopify.com/s/files/1/0437/0884/2152/files/gosutisunifojimivowi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/libutufisolefod.pdf
    • https://cdn.shopify.com/s/files/1/0431/6908/7642/files/mogaxikusimeva.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_off0000453a.bin
d93624bf4afdc7399bafeefff0407ff893970564de093c196ac79ffa0e0e0cba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x453A 5224 bytes
font_01_sfnt_off00005705.bin
ddc774aaa7f01d5e2ecc009262aa30cf20d26a04aa37fa050c7f7b3109cb0d0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5705 10296 bytes

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