Malicious PDF — malware analysis report

Static analysis result for SHA-256 b94bd38bf3243349…

MALICIOUS

PDF

39.8 KB Created: 2020-09-15 12:49:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01315a2dab466f5bce6312f7ec6837ff SHA-1: 587b2ebec28974a670ea93d42f54ac1bca7e168a SHA-256: b94bd38bf3243349fac7e61a4c20adcfcd80c5529b6a111880ec85ac5a87578b
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, flagged as a 'PDF SEO Link Farm'. One of these links, 'https://ttraff.com/wb?keyword=determinantal%20point%20processes%20youtube', points to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body appears to be largely obfuscated or contains minimal readable content, but the presence of numerous external links suggests a campaign focused on link manipulation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.com/wb?keyword=determinantal%20point%20processes%20youtube
    • http://megadef.natanson-art.com/uploads/1/3/1/4/131438265/3903328.pdf
    • http://files.liberaljungle.com/uploads/1/3/2/6/132695257/63996858c178.pdf
    • http://files.shorelinebass.com/uploads/1/3/0/7/130776445/595fbc36ba.pdf
    • http://vujoziwa.warwickkentphotos.com/uploads/1/3/2/6/132696212/90e9a3050.pdf
    • https://static.usrfiles.com/ugd/762c1a_a54c943747c64c7aaff069aa79cce1db.pdf
    • https://static.usrfiles.com/ugd/ccf397_ae06330cbda94d9380f32eb0a2930c17.pdf
    • https://static.usrfiles.com/ugd/062c90_f80774cec3554deb8c31b5b2a0ab91ca.pdf
    • https://static.usrfiles.com/ugd/9219f8_390de3dd33204fb3a1235a760e270847.pdf
    • https://static.usrfiles.com/ugd/2e16aa_bb4c9e17f01f4c978ac5949b8fbc8cb5.pdf
    • https://static.usrfiles.com/ugd/e7e4a0_87e6982879b7425899b124e7fcfe9523.pdf
    • https://static.usrfiles.com/ugd/735424_c5b0402560cb430aaee10d19ac9d5a31.pdf
    • https://static.usrfiles.com/ugd/8b97dd_39c14f2d0b054e44863379363b3f1ea0.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_off00005f09.bin
1ab0a87000d823d13e0f6006ce6f43c0a5283638983774b40b6311d19faa1cfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F09 5320 bytes
font_01_sfnt_off0000710c.bin
faa800a3c6fb1db6c05433f000bbf40bf04794ff8119a86544c07ee6e18787ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x710C 9888 bytes

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