Malicious PDF — malware analysis report

Static analysis result for SHA-256 65903497a864a236…

MALICIOUS

PDF

38.0 KB Created: 2020-09-05 05:26:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 945052ae054cd659b6f2bbf03582636e SHA-1: 33548fdd4c3e39ae73c0f0719805353c9aab1b0b SHA-256: 65903497a864a2361ec0b848ed682abbef85a6278ceabfadcfa783628cc56faa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO abuse tactic. One of the primary links, 'https://ttraff.me/wix?keyword=dnvgl+class+status+report', is identified as a malicious redirector. This indicates the document is likely designed to redirect users to malicious content or phishing sites.

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.me/wix?keyword=dnvgl+class+status+report
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/36d413_943181c085a74153a59b3160a9420885.pdf
    • https://static.usrfiles.com/ugd/3e0cb9_dd6d46e44c814fafa3e1fb835294f11f.pdf
    • https://static.usrfiles.com/ugd/97368a_3a10d180e3bf440a8409571beb6ffbc6.pdf
    • https://static.usrfiles.com/ugd/717a42_a21a97d5b4d1467eae2e9a58986caa2f.pdf
    • https://static.usrfiles.com/ugd/1f2646_1894ea18453e4c79a8aecd358e684aa3.pdf
    • https://cdn.shopify.com/s/files/1/0428/5507/1900/files/boundedness_theorem.pdf
    • https://cdn.shopify.com/s/files/1/0435/1816/5146/files/beamng_drive_apk.pdf
    • https://static.usrfiles.com/ugd/726ec9_3288bf8d0a854beba0db57ed2ff69122.pdf
    • https://static.usrfiles.com/ugd/bf0735_80955bf1b85b4c93916150b39aff4e38.pdf
    • https://static.usrfiles.com/ugd/485053_4211a6dc03e04730b657eb19109be1ae.pdf
    • https://static.usrfiles.com/ugd/c618e9_e87121dc6cbf4675b48d4db7004099ac.pdf
    • https://static.usrfiles.com/ugd/b8c837_811a76de6e2a46d895548fab17035b52.pdf
    • https://static.usrfiles.com/ugd/7c3584_237b673fa2c64934a792228fdc73a6d2.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005823.bin
c8b96106cf72bd9ddc6ba687e5afea3dd3410cd86f843333d7fb5590c7a9cab5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5823 5160 bytes
font_01_sfnt_off000069d8.bin
b4aa05d913664f60da2a28b9f6490619b44df021e0451abcd1f7041da32ebf12
pdf-font-stream PDF embedded font (sfnt) at offset 0x69D8 9916 bytes