Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1cd8359595c156c…

MALICIOUS

PDF

42.8 KB Created: 2020-08-02 06:16:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e24692a26c00830a9f74cc08e3c1a93 SHA-1: 266b5673216930a8b20ec05ccbaf6b863013149c SHA-256: c1cd8359595c156c7cc7bfc59d7462d86b4d3e88f57c80b0a6d182e32d9d5c4d
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL 'https://ttraff.com/pify?keyword=salem%2527+s+lot+2004' as pointing to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting an attempt to manipulate search engine results or distribute content widely. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this PDF. The document body contains garbled text but includes the malicious URL, reinforcing its role as a lure.

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=salem%2527+s+lot+2004
    • http://files.rachelchristofferson.com/uploads/1/3/1/3/131381772/ae127e9fd2.pdf
    • http://files.capehornvet.com/uploads/1/3/1/3/131383342/sigovaxutoruvaduze.pdf
    • http://files.keebskorner.com/uploads/1/3/1/4/131454012/vuxibonoxuw_pevivigi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/xuwij.pdf
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/64020835982.pdf
    • https://cdn.shopify.com/s/files/1/0436/0421/3917/files/indiana_cdl_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/7978/5886/files/tudefuxezekego.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1742/files/84512901875.pdf
    • https://cdn.shopify.com/s/files/1/0433/7090/5756/files/php_reverse_shell_one_liner.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/rabizuvawena.pdf
    • https://cdn.shopify.com/s/files/1/0436/8603/5621/files/66576735315.pdf
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/gopebujegidobet.pdf
    • https://cdn.shopify.com/s/files/1/0431/1325/0965/files/12291810444.pdf
    • https://cdn.shopify.com/s/files/1/0437/1133/2507/files/kopebavowabupodugurinop.pdf
    • https://cdn.shopify.com/s/files/1/0429/2568/6951/files/4637674043.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_off00006a69.bin
4939dda6d600e2bf11ab054ed146fd458d26dc798938d7b167876458224d5880
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A69 5236 bytes
font_01_sfnt_off00007c30.bin
437d30be8e297e4b6e266e75b182e023865e4e3b81c1aeb78e18ea09454faa39
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C30 10072 bytes