Malicious PDF — malware analysis report

Static analysis result for SHA-256 efe084b259854b5e…

MALICIOUS

PDF

42.3 KB Created: 2020-09-01 13:49:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d14fc8316919edf81872cd4c4973db02 SHA-1: b7ab44bce19688974d08246bae0d4ff1d323162d SHA-256: efe084b259854b5ed7a28589e446bcacb31e82f54b6aaeebc6742a108b3a6303
152 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 disguised as a marine weather report. The document also hosts a large number of external PDF links, many pointing to static.usrfiles.com, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicates 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=long+island+sound+marine+weather+report
    • https://static.usrfiles.com/ugd/b8c837_6b6d999c51a34c7996ee9ac66540983d.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d10fabd072346dda4cf7dba52b25347.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c20278505c14891a2e7a81577fb5f91.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b5dc8a808694101a998a10af16fb305.pdf
    • https://static.usrfiles.com/ugd/c836c3_aa7f4f342d3c47b8be6d62b9014faab9.pdf
    • https://static.usrfiles.com/ugd/bf0735_c635f3b0700a46f48047cc6ef55bfc98.pdf
    • https://static.usrfiles.com/ugd/599026_ef9e34fc7663402eba5282fcad2f60af.pdf
    • https://static.usrfiles.com/ugd/b8c837_d850670ac11a4000abbfad43d7352e1b.pdf
    • https://static.usrfiles.com/ugd/e5cbe5_6c683a13ca264f1a951f1a96fba35e69.pdf
    • https://cdn.shopify.com/s/files/1/0464/5807/7352/files/28188290455.pdf
    • https://cdn.shopify.com/s/files/1/0434/9915/9718/files/jamozisejizasipasewenozag.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000671d.bin
099a991c3de8ce6592309e46f71ff9a5fdddff01e68856c017d5e9124dc8ac15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x671D 5408 bytes
font_01_sfnt_off0000796b.bin
2f5f8bb00c1cc378dbbb1816b85428e32b3937bd06fbc5fbf79289aed23b5db4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x796B 10204 bytes

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