Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc94e62d4b0ba307…

MALICIOUS

PDF

41.8 KB Created: 2020-08-29 11:23:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c023bef149f25993c3e731895b1394a6 SHA-1: 67d453f6c8c864f0ca0a7efc012e6dca1bfc7b17 SHA-256: dc94e62d4b0ba307c2dce4f38a23be8abfdde04063ed23e62c3c4dec66dee01f
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=propiedades+de+los+radicales'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many of which resolve to Shopify domains. The document body, though heavily obfuscated, contains the malicious redirector URL and several benign-looking PDF links, suggesting a social engineering attempt to drive traffic to malicious infrastructure.

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=propiedades+de+los+radicales
    • https://static.usrfiles.com/ugd/b8c837_5b60b0c50f844d458b006f84c3d5d206.pdf
    • https://static.usrfiles.com/ugd/b8c837_a2a6c8fbb3504d82b26f3919f6b39bf7.pdf
    • https://static.usrfiles.com/ugd/b8c837_b89788869c5943fcbffa2295ffcc492d.pdf
    • https://static.usrfiles.com/ugd/b8c837_82d68c2fe8a948b0bf6390ae701f5144.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce0224cb33c94551bada674aecdb7dcf.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9345/files/63561620902.pdf
    • https://cdn.shopify.com/s/files/1/0435/7075/7795/files/gapawimolopaduperazutatid.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6939/files/jufef.pdf
    • https://cdn.shopify.com/s/files/1/0434/6806/2872/files/42528503731.pdf
    • https://cdn.shopify.com/s/files/1/0451/1694/8633/files/varukuwagom.pdf
    • https://cdn.shopify.com/s/files/1/0433/4786/9850/files/photo_slideshow_html_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/2604/6362/files/calendario_agosto_2020_imprimir.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_off000064b9.bin
31311dab3467a9d7f9b84b675ceb4d13f0bdfbb04c192de46bac9473c70c3fb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64B9 5068 bytes
font_01_sfnt_off000075f8.bin
64fd791772b7a73a57622821f389d5242360cb892afc9c7e72d0662e7981e071		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75F8 10800 bytes

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