Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef6ea72bbfddda44…

MALICIOUS

PDF

47.8 KB Created: 2020-08-31 10:50:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea25d61b8c379a9f87ce0f5fc9ae9bf3 SHA-1: e2bef2d3ed29df50dbee36b9d6654245bd8f564a SHA-256: ef6ea72bbfddda445f292967b414c72d1fcf005749e28e9a6411d84e4a9de8ea
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to direct users to further malicious content. The document body, though heavily obfuscated, contains the same URL and appears to be a lure. The PDF also contains a large number of links to external PDFs, suggesting a link farm or redirection strategy. The ML classifier strongly indicated maliciousness.

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=compl%25C3%25A9ment+d+objet+direct+et+indirect
    • https://static.usrfiles.com/ugd/8b2c09_3aaf1b45744444d6a37a6e01d4990256.pdf
    • https://static.usrfiles.com/ugd/b7ed05_f707e157754244ed88b6854f6d55431b.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa1e322809b548269fa5bd30a424d21d.pdf
    • https://static.usrfiles.com/ugd/b8c837_e83e3481299b4288ad3cabdcf6e33d37.pdf
    • https://cdn.shopify.com/s/files/1/0431/9756/3037/files/16869246424.pdf
    • https://cdn.shopify.com/s/files/1/0429/7110/3395/files/lg_g6_h870ds_android_9.pdf
    • https://cdn.shopify.com/s/files/1/0440/8187/3048/files/62396344623.pdf
    • https://cdn.shopify.com/s/files/1/0439/8442/1022/files/patient_information_sjogren_s_syndrome.pdf
    • https://cdn.shopify.com/s/files/1/0440/5536/3734/files/rain_dial_manual.pdf
    • https://static.usrfiles.com/ugd/4b874d_ea230e61d869439f8b210312fa3bf11c.pdf
    • https://static.usrfiles.com/ugd/b8c837_44cef91b3e7e4b7b847f258b7b565b86.pdf
    • https://static.usrfiles.com/ugd/b8c837_d95d3d4b9e01494e8114e06dbf95f1fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_1952d86bb04c49bdba0097c72be3f467.pdf
    • https://static.usrfiles.com/ugd/c4ccc4_4b657fc92bc14bafb6ed737220e3c63a.pdf
    • https://static.usrfiles.com/ugd/a48928_658038a2f89642018199741eef3d4474.pdf
    • https://static.usrfiles.com/ugd/74a852_bb5230c347d140938007b9ff17ac9a49.pdf
    • https://static.usrfiles.com/ugd/a44510_dccd8e2a4f5a422dbc45c9d1960c7618.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_off00006833.bin
cef6ea0c44cac01661915e5a845a85f5e5b42b0d9eba1f5590f16fdd2e610bf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6833 5000 bytes
font_01_sfnt_off000078ce.bin
ed07f112ebee92780c35cb2c98b8f766337c0d46ab075f62189aa601482b254a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78CE 13740 bytes
font_02_sfnt_off0000a206.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA206 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.