Malicious PDF — malware analysis report

Static analysis result for SHA-256 8094c782694e9584…

MALICIOUS

PDF

34.1 KB Created: 2020-08-31 14:37:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d274fbc393f1986606c25c7ed0755830 SHA-1: 89054ff8246bd6584dd34e7b33f09dc6ac72e5f5 SHA-256: 8094c782694e95843f9863d90eee76ecc9e47089f340cb7f4b1aa8f5384c5f45
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is https://ttraff.ru/wix?keyword=transformation+in+bacteria+animation, which is flagged as a known malicious redirector. The document's content, though obfuscated, appears to be a lure to encourage clicks on these links, likely leading to further malicious activity.

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=transformation+in+bacteria+animation
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/4686/0957/files/2005_ford_explorer_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/2887/2359/files/97086018643.pdf
    • https://cdn.shopify.com/s/files/1/0431/4211/9592/files/xelasuxazikokite.pdf
    • https://static.usrfiles.com/ugd/b8c837_0112edbed89145b9be46dabcb3dd0050.pdf
    • https://cdn.shopify.com/s/files/1/0439/3625/2072/files/8125405279.pdf
    • https://cdn.shopify.com/s/files/1/0436/7086/4025/files/62678439422.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/64323412830.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf2b371bcc72483caeeb6e56aeef2e0a.pdf
    • https://static.usrfiles.com/ugd/b8c837_e6856b0e885b410c8240b9dfc9d2d567.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_off00004a5f.bin
2e7555f64d40d623cf8677c321419ecdd67f072b702ecbc98bc43c5742d33b1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A5F 5084 bytes
font_01_sfnt_off00005b91.bin
dc4b7c47ccea2a5f3cbe12c7e8cf2cd4e6e0156c0f1fc3244a46de5ab10ed0db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B91 9568 bytes

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