Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ba9f4317407bb5…

MALICIOUS

PDF

53.3 KB Created: 2020-08-30 22:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e123fe1f4ab2dbf5de824d470494231e SHA-1: ee82c4f8190fe4a197c821a78590bf3f2303788f SHA-256: 47ba9f4317407bb53fef234701dd4448f018fd9d41e7c0bf89b81a8eda34fe0f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.ru/wix?keyword=hughes+and+kettner+tubemeister+36. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to direct users to malicious infrastructure. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

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=hughes+and+kettner+tubemeister+36
    • https://static.usrfiles.com/ugd/a107db_1419e7648c054874901c029861a40dcd.pdf
    • https://static.usrfiles.com/ugd/0c268c_bff08741d4844ad78b6baf2001646c8a.pdf
    • https://static.usrfiles.com/ugd/74c34a_0cfb26db30634e9cb465ac44e304b388.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_2b3fdae743c942afa0e15f767e29e566.pdf
    • https://cdn.shopify.com/s/files/1/0429/2568/6951/files/rinebubalaberutop.pdf
    • https://cdn.shopify.com/s/files/1/0434/5918/2745/files/tekkit_classic_sphax.pdf
    • https://cdn.shopify.com/s/files/1/0432/7365/0334/files/thinking_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0433/1195/6126/files/tijivusuloperugeva.pdf
    • https://cdn.shopify.com/s/files/1/0436/7620/5209/files/anemia_por_deficiencia_de_cido_flico.pdf
    • https://static.usrfiles.com/ugd/432b07_3bd1b3f144cf48c0a2fdf738379a4b32.pdf
    • https://static.usrfiles.com/ugd/510a18_89bc8d92e15548e3b7551af780b8510f.pdf
    • https://static.usrfiles.com/ugd/271e65_df8544f2fc564eb9ac0bce0688b26f42.pdf
    • https://static.usrfiles.com/ugd/b8c837_14a25d68ba944863b75be45b38f4838e.pdf
    • https://static.usrfiles.com/ugd/1f2646_c4f64bc6ca814d7b8e462cc57a9222bf.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_off00008428.bin
61c8f5eab3099c5594b3c794b270afda9dd9ffad0f9dbb95236aa28bb6917e72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8428 5460 bytes
font_01_sfnt_off00009676.bin
ff63f0104dc0a52edd088a95c1be4bb29ed565edeaba7eb4cc71bfc9646dfa18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9676 10680 bytes
font_02_sfnt_off0000ba3b.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA3B 4324 bytes

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