Malicious PDF — malware analysis report

Static analysis result for SHA-256 20d24e4815eacf51…

MALICIOUS

PDF

34.1 KB Created: 2020-09-02 13:40:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0664f782dde76063f95c4c41e66302f2 SHA-1: 8ed0a76f77895bc4838a04d306ec04eed70172b1 SHA-256: 20d24e4815eacf5170654858afaa579c0c2bae074a763c1d021945edcfda0c68
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the target URL. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the link, and PDF_SEO_LINK_FARM indicates a large number of similar links were present, suggesting a campaign to distribute malicious content. 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.cc/wix?keyword=aushadh+darshan+pdf
    • https://static.usrfiles.com/ugd/cb2bed_dd1123171e4146bd80b7d42ac834304a.pdf
    • https://static.usrfiles.com/ugd/c34aa9_3231eec24223446bae8fa50f7bf02665.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea5c6f37434c4358935f830292bf100c.pdf
    • https://static.usrfiles.com/ugd/f65518_e9cf208e5a244c93803bfdaf9e02028b.pdf
    • https://static.usrfiles.com/ugd/b8c837_b880260303124c3ebfbdd386b1fb8ee4.pdf
    • https://static.usrfiles.com/ugd/b8c837_778f982f150b4c5383f404ff608f319f.pdf
    • https://static.usrfiles.com/ugd/dc98cc_c225a579f302461496b868bae6e5939a.pdf
    • https://static.usrfiles.com/ugd/73f3b0_ee0c14e5a26b40c1a1d1dd86010d8e2a.pdf
    • https://static.usrfiles.com/ugd/b8c837_35bd33f1f3d04d798c75904b44f2219d.pdf
    • https://static.usrfiles.com/ugd/b8c837_79498a9681a742d5ad474c77ba802910.pdf
    • https://static.usrfiles.com/ugd/b8c837_b04b151de58545ecbe6dbab3f5d30991.pdf
    • https://cdn.shopify.com/s/files/1/0439/1721/3851/files/warm_autoimmune_hemolytic_anemia.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0325/files/20376405528.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/gonuvujixusox.pdf
    • https://cdn.shopify.com/s/files/1/0434/9421/1750/files/kak_rajayut_jenshini.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tadigepulimo.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_off00004940.bin
90006a6c4c1f128818d2adf6f5e28125602763d6b8bfc6af6ba534c4e2a03291		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4940 5084 bytes
font_01_sfnt_off00005a83.bin
78bea312981e9db47d2a68e9a7161df8ff4bb56172aba4a7214d2d75beb4db59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A83 9704 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.