Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b98a78cab86c726…

MALICIOUS

PDF

50.3 KB Created: 2020-08-15 05:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 970f2d1b2dc2bfe8b051279614997982 SHA-1: 62e5e2bc10453ff66f61061e20d469ec0e10dfde SHA-256: 4b98a78cab86c726596aac2ec6b5499085c41a3c4f19e79eca5464aa3813cc31
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is ttraff.com, which is used in conjunction with a keyword related to contractualization, likely as a lure. The document body, though heavily corrupted, contains references to the same URL and other Shopify-hosted PDF files, suggesting a link farm or redirection strategy. The ML classifier strongly supports the malicious nature of this PDF.

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/wb?keyword=eo%20on%20contractualization%20pdf
    • http://files.appwesley.org/uploads/1/3/2/6/132681488/e7cf2cb3190c.pdf
    • http://files.saintpaulcatholicchurchpocahontas.com/uploads/1/3/2/7/132740865/9848483.pdf
    • https://cdn.shopify.com/s/files/1/0428/9665/4499/files/febuj.pdf
    • https://cdn.shopify.com/s/files/1/0440/3609/6150/files/36534984401.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/91914187724.pdf
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/9277219317.pdf
    • https://cdn.shopify.com/s/files/1/0429/5986/3961/files/zafugonaneziferizidimel.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19189676900.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5774/files/vukekegegij.pdf
    • https://cdn.shopify.com/s/files/1/0429/9603/9839/files/kusixigozarumanavagolevip.pdf
    • https://cdn.shopify.com/s/files/1/0429/5317/9289/files/zibulivazatuwun.pdf
    • https://cdn.shopify.com/s/files/1/0428/6991/5814/files/vatuxikamuzajura.pdf
    • https://cdn.shopify.com/s/files/1/0429/3564/8409/files/69784340685.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007acd.bin
4c94e9d2122cf955a51bc9d4b419acdd36179989eb2ae071c4c8100f83e8e1f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACD 4744 bytes
font_01_sfnt_off00008af2.bin
64b03c4bac72fd046e61f02e75358c3bd9fbc5f2cb1c9a007ff7c15233f4a607		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF2 10304 bytes
font_02_sfnt_off0000ae24.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE24 4324 bytes

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