Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb7b80bb2598d9f9…

MALICIOUS

PDF

49.8 KB Created: 2020-09-02 03:43:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edfe0fa77e69aaf35c227d4ef6925867 SHA-1: 80439501affa96ec2ce5974152dd31623b04c436 SHA-256: eb7b80bb2598d9f948789e6417f4264ffbcd62359a28d42f15e61570889ffccc
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded URLs, one of which, 'https://ttraff.ru/pify?keyword=akai+mpk+mini+mpc+essentials+manual', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to 'Akai mpk mini mpc essentials manual', suggesting a lure to trick users into clicking the malicious link. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/pify?keyword=akai+mpk+mini+mpc+essentials+manual
    • https://static.usrfiles.com/ugd/850f07_dd29c780982e4c52b2c9232e90c5d16c.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa43d1a18dd641ab8843f3894462de78.pdf
    • https://static.usrfiles.com/ugd/7f16bd_c3fc2cd609794ed1a526ca9c5d7a9181.pdf
    • https://cdn.shopify.com/s/files/1/0428/9429/5203/files/28879676650.pdf
    • https://static.usrfiles.com/ugd/e23fbb_c31932f53eaa4efab158e74acb37cbd5.pdf
    • https://static.usrfiles.com/ugd/c8683e_6f90f351d83e4937b57fb0dde63b302c.pdf
    • https://cdn.shopify.com/s/files/1/0427/5362/2182/files/adjective_ed_or_ing_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0428/1466/8959/files/4765098842.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ce9.bin
1397e62359df154ef5e4e39ae75c0228a7ae69d403305454b47e8576780c7dc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE9 5036 bytes
font_01_sfnt_off00007dfb.bin
2bc014a612a42a0d86490ad282f1f5c4585ae81b3326076fcdae468616efd63f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFB 10192 bytes
font_02_sfnt_off0000a102.bin
36b2509fe8c6294f57eed52a7834cc1e97d520d584c6c4eb2e11cc524c3cd69c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA102 17332 bytes

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