Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d5b6eb9fb332663…

MALICIOUS

PDF

51.9 KB Created: 2020-07-31 23:57:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55881c67fd6baf987e5971b861344462 SHA-1: d74d89bd2cd5f790065f0f6c1ee0b1ce92da0f05 SHA-256: 1d5b6eb9fb33266393404330b626750147926c7d764655e5a8661355babbcfd8
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at 'ttraff.cc'. This suggests a social engineering attack aiming to trick users into downloading further malicious content. The document body, though heavily obfuscated, contains the text 'Pmp flashcards 5th edition pdf' and the malicious URL, reinforcing the lure.

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/pify?keyword=pmp+flashcards+5th+edition+pdf
    • http://files.empowerherct.org/uploads/1/3/0/7/130739398/7306693.pdf
    • http://files.gemscorner.org/uploads/1/3/0/7/130775752/8518475.pdf
    • http://files.novelsf.com/uploads/1/3/1/4/131483550/mataxopawowojuvuba.pdf
    • http://files.harrisondomain.org/uploads/1/3/1/4/131408172/2013890.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/47492761885.pdf
    • https://cdn.shopify.com/s/files/1/0432/7967/9656/files/56132424244.pdf
    • https://cdn.shopify.com/s/files/1/0433/6323/8056/files/wuludikuzira.pdf
    • https://cdn.shopify.com/s/files/1/0437/6926/6325/files/wisdom_saving_throw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65788935473.pdf
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/nitom.pdf
    • https://cdn.shopify.com/s/files/1/0430/9234/4999/files/47124067352.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/sidezenapinomemakizejaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/4834/5500/files/30789706404.pdf
    • https://cdn.shopify.com/s/files/1/0431/8360/3873/files/63755765373.pdf
    • https://cdn.shopify.com/s/files/1/0431/6335/3250/files/82441075013.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24501063531.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_off00008a4e.bin
af2874607944f94c57115c0dee6092e447b1ea06aa5b2e11aaf90cdc935f37c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A4E 5520 bytes
font_01_sfnt_off00009ced.bin
4db3e3308841cb89a07808296d343c020d984e28c8dfd91658bf98a84ff5885a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CED 10664 bytes

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