Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd6ded36a01c68d3…

MALICIOUS

PDF

49.0 KB Created: 2020-08-18 19:12:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 071f9ca415e06b184b334b6cf2822f06 SHA-1: becb9cf40e74ab2bba0a0797986f05649acf56be SHA-256: fd6ded36a01c68d34d16cdd1434d19682e2b13a7c2a04b1275c611a464ff4efe
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links pointing to external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. One of the primary links, https://ttraff.com/pify?keyword=manual+para+aprender+frances+pdf, is identified as a malicious redirector. 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/pify?keyword=manual+para+aprender+frances+pdf
    • http://natil.mortzheim.com/uploads/1/3/0/8/130874493/sefiwej_texewam.pdf
    • https://cdn.shopify.com/s/files/1/0437/0386/1416/files/alimentacion_saludable_para_deportistas.pdf
    • https://cdn.shopify.com/s/files/1/0431/9435/1778/files/duminape.pdf
    • https://cdn.shopify.com/s/files/1/0432/2872/5405/files/31967081414.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5404/files/30464006092.pdf
    • https://cdn.shopify.com/s/files/1/0439/0528/6296/files/83168998754.pdf
    • https://cdn.shopify.com/s/files/1/0437/1090/6520/files/duvudekudatusol.pdf
    • https://cdn.shopify.com/s/files/1/0432/8574/1726/files/calderas_de_vapor_pirotubulares_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0432/2348/2525/files/75175315201.pdf
    • https://cdn.shopify.com/s/files/1/0435/0096/1947/files/dobevuzuzusebilasaja.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/21574837125.pdf
    • https://cdn.shopify.com/s/files/1/0435/4736/1439/files/love_marriage_vs_arranged_marriage_essay.pdf
    • https://cdn.shopify.com/s/files/1/0434/1307/8168/files/93590844135.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_off00007ebd.bin
fd60abe00e600a17424372facfe4b6cf6940f11d31bd00a533b44593813f57e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EBD 5156 bytes
font_01_sfnt_off00009056.bin
3435ef6a4f1d9892e71b4e589e28365b09364c8c619b0ec98fe15d126e625e0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9056 11476 bytes

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