Malicious PDF — malware analysis report

Static analysis result for SHA-256 78029d58fe4b9afb…

MALICIOUS

PDF

40.4 KB Created: 2020-08-30 21:22:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a6eddc232fbd87627897a7927342180 SHA-1: 85ad946894ce73a1895ba4664c519bba5b3cc604 SHA-256: 78029d58fe4b9afba52800b19552b7a2b1cee74e7a2d323f388886c97d8dab07
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains embedded links that point to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure the user to a malicious site. The presence of numerous other PDF links, many of which are benign, indicates a potential link farm or SEO manipulation tactic to obscure the malicious intent.

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.com/wix?keyword=kreo+star+trek
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_e43cd70dca8b46ba9686f78f1d9aba3d.pdf
    • https://static.usrfiles.com/ugd/b8c837_a070c81b71a24ae6b21dd10e15ed75aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_bbc5d4d42aef426d9b0325a200230972.pdf
    • https://static.usrfiles.com/ugd/865d50_fdd788a1f0ad4d28a04767d1b7efd155.pdf
    • https://static.usrfiles.com/ugd/b8c837_d422ec1068354474a274f0a8a3d3554d.pdf
    • https://static.usrfiles.com/ugd/fe83c3_857696a7030749d6a067605fe7c867d0.pdf
    • https://static.usrfiles.com/ugd/b8c837_ae7f3d9bb53748aea81954be1bb67ec9.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b1b63a1a5464ea5ad75349c5086a720.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a2a32c4edec44e8b0af498f39596da7.pdf
    • https://static.usrfiles.com/ugd/b8c837_d25d82c8fd9f4ffeb8bf7ae5e9b12481.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c8325fd6a234d2886ca14550ba56567.pdf
    • https://static.usrfiles.com/ugd/24853a_8e0c9d38a4014a6a8da9d07d0c2b165f.pdf
    • https://static.usrfiles.com/ugd/7603ae_6ee53c39234444db9cb1e200223bb2dd.pdf
    • https://static.usrfiles.com/ugd/405339_4482152057034f39ab8a5594008d7da0.pdf
    • https://static.usrfiles.com/ugd/2486b5_49b6eac835ad40548f4fd8782b490474.pdf
    • https://static.usrfiles.com/ugd/429b25_676b6c6f42294d88b255c69cd7c4b059.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_off000061bf.bin
20acd7633edc09bc93431f1ecf0b27cb4009289cb0c09a49b5bb2226a7ea2459		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61BF 4680 bytes
font_01_sfnt_off000071b6.bin
cd2ffbadc8920702f71d0b69585d1cf463f70930aa144c896ba37ff74b565c1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B6 10436 bytes

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