Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dc058ab2857a6d1…

MALICIOUS

PDF

42.4 KB Created: 2020-08-23 22:59:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9992ac1fe342805ac3df72daeba40fe SHA-1: 2b884e5348bf613d800b310ac2361023d15e439c SHA-256: 1dc058ab2857a6d147d6826225c7c2405cb27901ac19ce8f9d604e310221e590
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a significant number of embedded links. One critical heuristic identified a link to known malicious redirector infrastructure, and another noted a large external PDF link farm. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=transformation+chimique+definition+svt, suggesting a lure related to 'transformation chimique definition svt'. The primary attack pattern involves redirecting users to potentially harmful sites.

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=transformation+chimique+definition+svt
    • http://xewuwadat.sig22neuroeducation.com/uploads/1/3/0/7/130739379/ea9b5e97.pdf
    • http://files.hartauditorium.org/uploads/1/3/1/3/131382470/6401688.pdf
    • http://files.ccbcmassagetherapyprogram.com/uploads/1/3/2/7/132740424/0f840574.pdf
    • http://files.theteapsy.com/uploads/1/3/1/0/131069763/7272041.pdf
    • https://cdn.shopify.com/s/files/1/0458/6438/6713/files/98213739393.pdf
    • https://cdn.shopify.com/s/files/1/0430/2195/9325/files/sisum.pdf
    • https://cdn.shopify.com/s/files/1/0437/7736/0029/files/69713062179.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0104/files/98758132426.pdf
    • https://cdn.shopify.com/s/files/1/0437/7988/3170/files/12488364314.pdf
    • https://cdn.shopify.com/s/files/1/0430/5515/3303/files/vigupokavatavuxuze.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/60605720103.pdf
    • https://cdn.shopify.com/s/files/1/0440/5392/1957/files/19615237343.pdf
    • https://cdn.shopify.com/s/files/1/0431/6626/9597/files/zaxosenefiwuxuwijida.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38935964995.pdf
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/notiregegur.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_off0000667d.bin
899374e5e4f826195c3b5d1d778565ea5c839f5f03ce9d47e3d01564a1d0e326		 pdf-font-stream PDF embedded font (sfnt) at offset 0x667D 5364 bytes
font_01_sfnt_off0000788d.bin
5bac9df7b570d6326e5a43753f4ca7f5b606b7bd3553e2599742b254767294d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x788D 11160 bytes

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