Malicious PDF — malware analysis report

Static analysis result for SHA-256 36f3b99c9d58049d…

MALICIOUS

PDF

45.2 KB Created: 2020-09-15 22:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0462ad021c8b621806eddf05b1d67be SHA-1: 8e51ebd858a9dabc7626c4817e046e68787b1527 SHA-256: 36f3b99c9d58049deef906d53db7f8f7ec72de0f8111551613de5c8a2e83d777
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a high number of embedded links, many of which point to suspicious domains and are likely part of a link farm designed for SEO manipulation. One prominent link, 'https://ttraff.club/pify?keyword=does+r-form+slim+keto+work', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a coordinated effort to drive traffic to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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.club/pify?keyword=does+r-form+slim+keto+work
    • http://jivukeb.paulavanbeek.com/uploads/1/3/1/4/131407253/xoxipaf-wejise-nalasuvana.pdf
    • http://xidakolas.oesubmuact46.org/uploads/1/3/1/4/131437502/muvotax.pdf
    • http://files.sahityasangam.org/uploads/1/3/1/4/131452942/0584c1.pdf
    • http://redizowad.thevelofellow.com/uploads/1/3/0/7/130739956/juributaza.pdf
    • http://lamarebo.sketchwerx.com/uploads/1/3/1/4/131407005/dobesuk.pdf
    • http://files.mieswholesalemeats.com/uploads/1/3/0/7/130739415/97bf9ed13682.pdf
    • http://pobebune.myyogajourney.co.uk/uploads/1/3/2/6/132683078/xirixivimopopajefa.pdf
    • http://files.blunderhalldogfood.com/uploads/1/3/1/3/131379828/fc82dc3e.pdf
    • https://cdn.shopify.com/s/files/1/0430/1701/1353/files/80763023884.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/shanti_narayan_differential_calculus_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/4610/0374/files/demotebavopo.pdf
    • https://static.usrfiles.com/ugd/b8c837_e687bd6877354514be288505e5b4670b.pdf
    • https://static.usrfiles.com/ugd/4ae4db_b4d49af7e30047fba713c056b75bca8b.pdf
    • https://static.usrfiles.com/ugd/682d1c_4adf03f99a114624b52d09e249a8b573.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_off00006c04.bin
b2774c17aa3e42cfa69be4bd7573287ac29a61f804eb9e5680af6d0c7ade1824		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C04 4892 bytes
font_01_sfnt_off00007cb3.bin
fc708840bd58ce543b8afa5d828520ca3b2ea53d23310a7359bb929d94786e19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB3 13360 bytes

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