Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffd4658c33711ccc…

MALICIOUS

PDF

38.2 KB Created: 2020-08-31 01:19:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2b1c29f9981ff9aaffcded2c169ef5e SHA-1: 3b0135b2e7efd125be46d441e5f826d282997ee9 SHA-256: ffd4658c33711ccc2348c7a61d9062e8fe1c3f73dbc8a654a46397d7ecb5b4d0
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a primary link pointing to a known malicious redirector. The document body, though partially corrupted, includes text that appears to be search result titles, suggesting a lure to trick users into clicking the malicious link. 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=busqueda+implacable+espa%2525C3%2525B1ol+latino
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/rodor.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nazowexoratusitufunu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3141/3414/files/wevinesaxewoxigamij.pdf
    • https://cdn.shopify.com/s/files/1/0435/2586/5636/files/mefawokemiverawewupir.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1537bbddb36496ba8d58b19bf8e11e4.pdf
    • https://static.usrfiles.com/ugd/1be480_ec90933235dc490d9af23811d7bb4051.pdf
    • https://static.usrfiles.com/ugd/67e251_ab8918aef83d42b9bb796350ae9bcf6b.pdf
    • https://static.usrfiles.com/ugd/dc51bb_1a1f14e4f2ab41afa9fa53fc260692f8.pdf
    • https://static.usrfiles.com/ugd/83b1b3_16e5127644d049698a578cef339e334e.pdf
    • https://static.usrfiles.com/ugd/3ceeb9_0dafd74eafcb47e2ab2dfc78c93c6330.pdf
    • https://static.usrfiles.com/ugd/b8c837_741273a2249342bf9de31be1a1f09d25.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/werikoneremoliwisekef.pdf
    • https://cdn.shopify.com/s/files/1/0430/4506/0762/files/fomokuwitulugugev.pdf
    • https://cdn.shopify.com/s/files/1/0430/2694/0067/files/sandler_thermodynamics_4th_edition_solutions.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_off000048d1.bin
d60bf87abedd3b68740908a62cf73235ece4c84f243ffa8f7a564dda4ecd01ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48D1 5652 bytes
font_01_sfnt_off00005ba9.bin
909b4f9661ac5b68faa4e6f7ff56b4d2446293a00b1bbe6b77d0b87f55a3fc45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA9 14732 bytes

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