Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb9675e205b0593…

MALICIOUS

PDF

42.8 KB Created: 2020-08-30 01:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 125578d5891ae30c9f952fc8ed1a7fcd SHA-1: 0747c94285a2c0fb02a43c2045b0528d393411ec SHA-256: 9eb9675e205b0593cdd750e3b862259b2160fe3a7c935a901732f7a6fcce795f
152 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by a machine learning classifier and contains a large number of embedded links. One of these links, https://ttraff.com/wix?keyword=heinrich+w%25C3%25B6lfflin+renaissance+und+barock, points to known malicious redirector infrastructure. The document appears to be part of a link farm designed to manipulate search engine results or redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=heinrich+w%25C3%25B6lfflin+renaissance+und+barock
    • https://static.usrfiles.com/ugd/b8c837_b53e9525bd1749be8c2034ce0e38c3fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_1089c6a8614948b79ff195f8fdd50e4e.pdf
    • https://static.usrfiles.com/ugd/122077_dada18df601641208de9642735f761c9.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd07b4a2eac2446b842baa1a30769680.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_f7bb7183a8c54bc7a8a8b0f98027ff60.pdf
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/xutefitefulixulox.pdf
    • https://cdn.shopify.com/s/files/1/0430/6596/6754/files/19641394095.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7621/files/gufinejinitawoxug.pdf
    • https://cdn.shopify.com/s/files/1/0430/4188/2265/files/zikokoguxozidatiladopoge.pdf
    • https://cdn.shopify.com/s/files/1/0452/0011/3813/files/10539204477.pdf
    • https://cdn.shopify.com/s/files/1/0434/6006/7481/files/47065842005.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_off0000658b.bin
723ca84ab370b401288f79904204a0372af951285c1ff01c93c4231962a638c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x658B 5504 bytes
font_01_sfnt_off00007803.bin
d5b50822f4628275f7ba12faf928f3fdb7cb57e9bea9bd405c0e01fe118be9bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7803 11104 bytes

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