Malicious PDF — malware analysis report

Static analysis result for SHA-256 023811e3f6ed56ab…

MALICIOUS

PDF

73.1 KB Created: 2020-08-30 10:54:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 550b567a375af97681019481178eadf4 SHA-1: 78a4ee083ac2cadb0fb73339af4a785dc1e8bb0e SHA-256: 023811e3f6ed56abbfe709b62607462cb61a7c3488ed1f7f0e62b883bf5c94ac
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.com/wix?keyword=partition+le+dernier+des+mohicans, which is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain the title 'Partition le dernier des mohicans' and references the wkhtmltopdf tool, suggesting a lure to disguise the malicious link farm. The presence of numerous links indicates an attempt to drive traffic to potentially malicious destinations.

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=partition+le+dernier+des+mohicans
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/4cf28d_76bb6cd5a5054d95aeda24ef521737b3.pdf
    • https://static.usrfiles.com/ugd/a48928_808b3f8313a4481b847a0a64d5c5dedd.pdf
    • https://static.usrfiles.com/ugd/ca300b_580be9b651e94a7785cf6dde4b6eb10b.pdf
    • https://static.usrfiles.com/ugd/0a0016_449d3f6184844ae09ed68dcbd7bb21dd.pdf
    • https://static.usrfiles.com/ugd/b8c837_235f4b208c544ea4a61d2f19902fb17e.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce9dae056ce04bcc862e80f5ce3d29d4.pdf
    • https://static.usrfiles.com/ugd/d43733_9f9a1a1c631744e1b3e7aaf2b98b95fd.pdf
    • https://static.usrfiles.com/ugd/b8c837_5915ebbfb8bb455f8e6a356e97e78d53.pdf
    • https://static.usrfiles.com/ugd/824332_a05aa7288a3d45429836a265e610e9a6.pdf
    • https://static.usrfiles.com/ugd/b8c837_d345e268873f4e8cafee38c42d1886bc.pdf
    • https://static.usrfiles.com/ugd/b8c837_4101ce32e5ee4723949f5e8fc928234a.pdf
    • https://static.usrfiles.com/ugd/b8c837_241b7401b0894806bcb139ab019b1ac7.pdf
    • https://cdn.shopify.com/s/files/1/0428/3547/6636/files/97642246320.pdf
    • https://cdn.shopify.com/s/files/1/0434/8212/0358/files/wakawodijiwi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1989/3927/files/tazoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/5919/1712/files/skype_for_business_web_application.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c06c.bin
401e5353261b5fe3bb0140e2274b2cbe0622a60aefd341e5ee799a0e20171c2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC06C 5180 bytes
font_01_sfnt_off0000d1d0.bin
15501d315c1d33861c0c5fced7d6a4310edaa6c49e00c834e4341a80327c3f3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D0 12912 bytes
font_02_sfnt_off0000faeb.bin
b6ea50c3dd34f739f621786581345d12ce889cc96b87dc4bb77243f4df1ae49d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEB 17652 bytes

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