Malicious PDF — malware analysis report

Static analysis result for SHA-256 a16e20bf13db7c9f…

MALICIOUS

PDF

31.5 KB Created: 2020-08-29 19:02:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c997f1f4c783b3965d6bbd04fb9135d6 SHA-1: 7e9018c22367b558ed50ecb05e482212062dcebf SHA-256: a16e20bf13db7c9f2355b670188470e70b0b26f3b88113ba09c042a69456b24b
152 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, ttraff.ru. The document body, though heavily obfuscated, contains text that appears to be a lure for owner's manuals, aligning with the redirector's keyword. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the embedded 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=2003+grand+marquis+gs+owners+manual
    • https://static.usrfiles.com/ugd/b8c837_8721ec39ed8242659ef8b3856c7e077f.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a9cd31d2d9843b48d244e41380b1e88.pdf
    • https://static.usrfiles.com/ugd/b8c837_46bf330e27584553aab49ae9ada44e2d.pdf
    • https://cdn.shopify.com/s/files/1/0433/4904/9494/files/vyapar_premium_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/1612/5590/files/83567922850.pdf
    • https://cdn.shopify.com/s/files/1/0432/8400/5032/files/639326608.pdf
    • https://cdn.shopify.com/s/files/1/0457/6519/7988/files/accounting_101_final_exam_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/5095/7991/files/32588579471.pdf
    • https://static.usrfiles.com/ugd/b8c837_31e17141cec84f3680680dc50bba2ba8.pdf
    • https://static.usrfiles.com/ugd/b8c837_4dd1d581fa7e47719c9a1f79b245599e.pdf
    • https://static.usrfiles.com/ugd/33a2e4_a76b10840522423c990d63a7d309883b.pdf
    • https://static.usrfiles.com/ugd/b88e3d_a074dd74e0d749f9a656abae66aeed41.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_off00004089.bin
28bd9e04639f80de15fe75a0437ad9c81e9d9f470e6cea0e1b636d46ce059190		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4089 5704 bytes
font_01_sfnt_off000053d6.bin
d439c04c6f9e2fcbda27d0b42823bab032d7a57ce76fc760b6cca0109a36ae8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53D6 8920 bytes

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