Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c9e7d150a91c5e7…

MALICIOUS

PDF

42.5 KB Created: 2020-08-30 21:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01eb0f223975b7aeb7493af66e1de121 SHA-1: f455384b2dfb984aef79d22debbe22a1621610e8 SHA-256: 4c9e7d150a91c5e702d560d6baff608e8dd8e42dc5c90da7befd29e72072e91b
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 a link farm designed to manipulate search engine results. One prominent link redirects to a known malicious domain, ttraff.com, which is likely used for further redirection or malicious content delivery. 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.com/wix?keyword=activities+for+developing+critical+thinking+skills+pdf
    • https://cdn.shopify.com/s/files/1/0432/6277/1366/files/25059289217.pdf
    • https://cdn.shopify.com/s/files/1/0433/8073/6156/files/bidezatux.pdf
    • https://cdn.shopify.com/s/files/1/0434/3024/8600/files/54634545417.pdf
    • https://cdn.shopify.com/s/files/1/0437/4380/5594/files/13655385459.pdf
    • https://static.usrfiles.com/ugd/64f9d2_acdd8ad541f34f34819bb4b39e1402a8.pdf
    • https://static.usrfiles.com/ugd/89c6ad_42c9ea4aa6724474b3b5f37a88c0625a.pdf
    • https://static.usrfiles.com/ugd/b8c837_59de6ac12912479a83686689179d656e.pdf
    • https://static.usrfiles.com/ugd/b8c837_9442942980d449109f7e8df780c43b35.pdf
    • https://static.usrfiles.com/ugd/23e9be_dd0ef0bcf71e435095b96ed634748529.pdf
    • https://static.usrfiles.com/ugd/a382ee_205106019625439aa61f8782f2a32fa1.pdf
    • https://static.usrfiles.com/ugd/b8c837_41d13a3249a24646b06d8eedd46bd597.pdf
    • https://static.usrfiles.com/ugd/c7a620_0d9e34af7241411aae89f0da7ba1293d.pdf
    • https://static.usrfiles.com/ugd/3aca14_bf43c86c5adb4c0c87708fd92c7c63f3.pdf
    • https://static.usrfiles.com/ugd/b8c837_ca5af8255dab4f77b418bf4e95e8d011.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_off0000669f.bin
5adf0af753ccc63386ea8f3579c28cff301c225f20ab094702d88ebb115a3566		 pdf-font-stream PDF embedded font (sfnt) at offset 0x669F 5532 bytes
font_01_sfnt_off00007962.bin
eef5484e11d66386ff371721550bd397859673ac419bfed2187df49be74824eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7962 10572 bytes

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