Malicious PDF — malware analysis report

Static analysis result for SHA-256 24a71c8d5a05babd…

MALICIOUS

PDF

39.4 KB Created: 2020-08-28 21:28:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1b59fbed7318ef46ed53dbb34de433d SHA-1: 506cf6549f90f0525a9bd790b95b1aebd86274b1 SHA-256: 24a71c8d5a05babdd12136966acef84d72c409a9287dfd0c4d3be4c9cffcc31c
150 Risk Score

Malware Insights

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

The PDF file was flagged for containing a malicious redirector link and a link farm. The primary malicious URL identified is ttraff.com, which is likely used to host phishing content or distribute malware. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDFs, suggesting a coordinated effort to drive traffic to malicious sites. 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.com/wix?keyword=propuestas+para+no+contaminar+el+agua
    • https://cdn.shopify.com/s/files/1/0434/4525/6344/files/26139734695.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/3d_to_stl.pdf
    • https://cdn.shopify.com/s/files/1/0434/4211/0631/files/10976267469.pdf
    • https://cdn.shopify.com/s/files/1/0438/0921/0529/files/4904626394.pdf
    • https://cdn.shopify.com/s/files/1/0431/1603/6257/files/nagak.pdf
    • https://static.usrfiles.com/ugd/b8c837_7aad1a7d4d234b7d821a4e902bbc6bbb.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef9bff7715084d1098bf4381f9438443.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ee1cf382a9e47acaf634a3dbb58835d.pdf
    • https://static.usrfiles.com/ugd/b8c837_6dada1dcff33497a9e03ed2b0f4820b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb535a3769be4c5fbdc1600a9f909bca.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a625bdb0bbc4245b356fa1e0d79689b.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_off00005af6.bin
a018595a75f8e3767f67435d61238c97c98e65d5b4bd7f0d7e4dafd499430467		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AF6 5256 bytes
font_01_sfnt_off00006cb7.bin
b40276db64a032e010852ce202ae4546d3d9679466910c3806c9c03a3bd8eee6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB7 10708 bytes

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