Malicious PDF — malware analysis report

Static analysis result for SHA-256 0126daa3d6f93906…

MALICIOUS

PDF

40.9 KB Created: 2020-08-29 21:48:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 510acccf1d5f2420130b7aeae551ce94 SHA-1: 07e4e0e48f9c6c7d058ffee2027bd953658d1747 SHA-256: 0126daa3d6f93906bb4780fe31ce7880d140c8ee6399802198408cbfd5452394
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains multiple URLs, including the primary malicious redirector. The presence of a link farm suggests an attempt to distribute malicious content or lead users to 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.com/wix?keyword=corundum+ingot+skyrim+id
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/f09a9d_38ad9201f60c4cbaa25affaf12031b38.pdf
    • https://static.usrfiles.com/ugd/b8c837_f60e6bf37bba49bab33a35556f3a8162.pdf
    • https://static.usrfiles.com/ugd/b8c837_b03186a7889a48b0953badab8c95f49f.pdf
    • https://static.usrfiles.com/ugd/b8c837_b598d61539d341b69596c25235f27f7c.pdf
    • https://static.usrfiles.com/ugd/b8c837_66e615173dc842f485a4b6990aa8b426.pdf
    • https://static.usrfiles.com/ugd/39cb9d_9b1a112e46ec4e1398c5bfb3f5b35b71.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6b1f197b51947cfb8d0d19ce9cda23c.pdf
    • https://static.usrfiles.com/ugd/b8c837_b41ed9564edc49e481e31d1d9dac9b30.pdf
    • https://static.usrfiles.com/ugd/98e298_2d19fbc4b788401fb155d362d79e8c75.pdf
    • https://static.usrfiles.com/ugd/b8c837_de817e6e5a23422ca92ce706d3a67a46.pdf
    • https://static.usrfiles.com/ugd/b8c837_2ac059802fc34f08872ac0a45fc587c4.pdf
    • https://static.usrfiles.com/ugd/b8c837_a47dd791f8354667970fb3e2ffea5297.pdf
    • https://static.usrfiles.com/ugd/1d64af_a0dc7548380446cab191b048122a41e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_9dedc56197484533b1324d7af58c9926.pdf
    • https://static.usrfiles.com/ugd/f0e51d_d489c07c44ac4e24a7cec96e0c84f1a2.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005760.bin
19fe6d3511270ee3ff4fbce704f5f4a9fb9182a4344e37e40a38d55828b07e20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5760 3312 bytes
font_01_sfnt_off00006341.bin
04e3cc68997ab295c1fd533e95f51494c12ddf1bf23990858543b1d2c6d23afb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6341 4976 bytes
font_02_sfnt_off00007420.bin
a6f7cf8e98c12db4eaddf901de602421314bbca65801fa70e332e5ed7e63d375		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7420 10344 bytes

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