Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f20a816a98cc8fc…

MALICIOUS

PDF

41.3 KB Created: 2020-08-31 08:44:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10c5816e138fa58b79a281491a0e8c1d SHA-1: 41f3fdcfeeb3dfc1b985c5d1d298bc4c75b02676 SHA-256: 6f20a816a98cc8fc141cbfddd635a61e689021734c1c5084a2105c99bc1b8a36
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.ru/wix?keyword=satanic+lust+spell', is flagged as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, also contains this URL, reinforcing the redirection attempt.

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.ru/wix?keyword=satanic+lust+spell
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/09273f_077d54363b0b4a839250942232cf9b98.pdf
    • https://static.usrfiles.com/ugd/b8c837_e9030ce3d0a24487bfa3df5b395c9017.pdf
    • https://static.usrfiles.com/ugd/0d2908_600ba7b9537f4375b3a052704c582cbc.pdf
    • https://cdn.shopify.com/s/files/1/0436/9947/0486/files/list_of_d_d_races.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/16376422301.pdf
    • https://cdn.shopify.com/s/files/1/0428/9809/6284/files/50839785514.pdf
    • https://cdn.shopify.com/s/files/1/0433/5039/2984/files/girogumotigeraliw.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c5f3da769b44a55b7a000acd9b8f06c.pdf
    • https://static.usrfiles.com/ugd/b8c837_6ca6542135bd4338936826dc674c0e5c.pdf
    • https://static.usrfiles.com/ugd/9734e7_65db04fb2dbe4b769dbc8bf847aaefd0.pdf
    • https://static.usrfiles.com/ugd/82e28d_e34635ddcb6a47d3a44272df7b3d0fd9.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_off000061c9.bin
5d235b385b1bd151ca8f81c8e9092187dd7ee444574182892cb563c73ddcf86c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C9 4932 bytes
font_01_sfnt_off00007298.bin
a0750ee99fc8c72432ec1b262f2668b3cc29d74515b7f66959a45346d8a003de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7298 11300 bytes

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