Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e3fce10201d2f89…

MALICIOUS

PDF

39.1 KB Created: 2020-08-31 08:43:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dfd6b7cfa3437eb5d73a44367a814db SHA-1: 907e113a5103e19159a1c8c878827ef6be7821f6 SHA-256: 8e3fce10201d2f89bf6d602e7942ff0520db97fb7685468b8cfda32196274f97
150 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains the title 'Cramer's v interpretation' and the same malicious URL, suggesting a lure to a malicious site. The presence of a malicious redirector link indicates an attempt to lead the user to a compromised or malicious resource.

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=cramer%2527+s+v+interpretation
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31321710084.pdf
    • https://cdn.shopify.com/s/files/1/0435/0256/7588/files/50349332238.pdf
    • https://cdn.shopify.com/s/files/1/0461/1692/9700/files/dulozepukowumukinanego.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/juzako.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e362e22f6a045fbb111428791bbeb6a.pdf
    • https://static.usrfiles.com/ugd/ca9b0a_8ee319ad4a1446c5bce17a8649fe0156.pdf
    • https://static.usrfiles.com/ugd/b56239_5a0723262c6d46069276fc50e9df9bc7.pdf
    • https://static.usrfiles.com/ugd/fd30ac_15d47420de0c4bad95f10c89a335126a.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63491738983.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8752/files/fun_activity_book.pdf
    • https://cdn.shopify.com/s/files/1/0436/0824/4381/files/css_background_transparent.pdf
    • https://cdn.shopify.com/s/files/1/0434/8497/1173/files/99188859947.pdf
    • https://cdn.shopify.com/s/files/1/0438/9135/9899/files/kozejagalel.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_off00005cfc.bin
ff808900cffb61a2be395ce4956e20caa17da3d7b5f1d8ef62963e711aa19be6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CFC 4932 bytes
font_01_sfnt_off00006db4.bin
765b53b47c1e7953f939795fa81ff39704d6f5235e1ff31981b0a53e0fa23c37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB4 10028 bytes

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