Malicious PDF — malware analysis report

Static analysis result for SHA-256 729fe426f617596b…

MALICIOUS

PDF

40.9 KB Created: 2020-08-30 09:24:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdb2880f101e7d99065d55a252baff85 SHA-1: 9d292f501458aaf80ad972a0a73ba7fb59ab3ae5 SHA-256: 729fe426f617596b653ac2339776f2c2e8c084e3625534aba232ebb75a089c87
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a malicious domain, identified as a redirector. The document body, though heavily obfuscated, contains text related to movie downloads and the malicious URL. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to trick users into visiting a harmful site.

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=juice+full+movie+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3629/5836/files/10005110893.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/davagolakuwob.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/ropaki.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/mitinitevoposugebewaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/2221956157.pdf
    • https://static.usrfiles.com/ugd/b8c837_dac20c1629db4edea42acf905b7e44bf.pdf
    • https://static.usrfiles.com/ugd/8b49c6_9cd5f4b0e2e4468f98b74412fd23b508.pdf
    • https://static.usrfiles.com/ugd/6df952_464b299b715342f39117e400727f4d5b.pdf
    • https://static.usrfiles.com/ugd/455f95_528a6aa85c9341b7b74c7ab5b90637a0.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000625b.bin
e41b973354cd91088b5da943b47aa4595d2ed5e1eb630664405d14b7f20bf0fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x625B 5036 bytes
font_01_sfnt_off00007383.bin
c41616b979087d527b207d3e0d92fa3cd39b541e89e5c6271a9749d8a03bdc48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7383 10560 bytes

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