Malicious PDF — malware analysis report

Static analysis result for SHA-256 64ebd974f0c58e42…

MALICIOUS

PDF

51.2 KB Created: 2020-08-30 08:49:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46eea89c087e5557275088da4ce71ac5 SHA-1: c1bb0fc7d9d723b81b4bb65a2077fabb59100933 SHA-256: 64ebd974f0c58e422096c80c73388e2221f774cc1830e12c293060724e839202
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=law+of+corresponding+states'. Additionally, it exhibits characteristics of a link farm, with numerous embedded URLs, many of which are benign Shopify links, but the primary redirector is flagged as malicious. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL.

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=law+of+corresponding+states
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/1850/0765/files/93097570240.pdf
    • https://cdn.shopify.com/s/files/1/0450/2398/5828/files/sukijawixudujuji.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0152/files/82458878322.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/19641090109.pdf
    • https://cdn.shopify.com/s/files/1/0434/4712/4130/files/research_concept_note_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1417/files/html5_educational_website_templates_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/3137/8590/files/jitokarekat.pdf
    • https://static.usrfiles.com/ugd/865d50_6c73b361ce1a4cafb031bf9f0e2b61f5.pdf
    • https://static.usrfiles.com/ugd/1c90dc_db57989d32a3486296e49d015ff76444.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f64df21bf014d7ab3f38b55f712d9d0.pdf
    • https://static.usrfiles.com/ugd/b8c837_6225c5f438aa4b61b80c7da4c7ea05b4.pdf
    • https://static.usrfiles.com/ugd/b8c837_f30c5b81840947059d01847d45cdc094.pdf
    • https://static.usrfiles.com/ugd/b8c837_58a5cd592390491e80ecaffb9388e4cf.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_off0000722e.bin
b37f1060e2ae88e499ec963111811f2ea84faf50d8d041c6c1747e341890e72f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x722E 5324 bytes
font_01_sfnt_off00008473.bin
65d01f1d88be761712920a43f535337600897af8609811fb3d1a5f6b8c0ea193		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8473 11312 bytes
font_02_sfnt_off0000ab07.bin
b10e7a0583bf6b216a5471aeed10f14210f1dda3adb60ac5169fcb38ba12e60c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB07 16060 bytes

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