Malicious PDF — malware analysis report

Static analysis result for SHA-256 94291ac5d8258c0d…

MALICIOUS

PDF

43.4 KB Created: 2020-07-27 16:07:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4292b0494fb8d81a20b45bec36a8168e SHA-1: 017e8e87b5f479e4f917447352069aea0c1fb2bb SHA-256: 94291ac5d8258c0dcea7bf6c79f5501f604cf48c3289ee4c49ebedf47ccf6ebd
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a 'PDF link farm'. One of these links, 'https://ttraff.ru/pify?keyword=chapter+31+phlebotomy+answers', is flagged as a malicious redirector. The presence of numerous links, many pointing to Shopify domains with numeric slugs, suggests an attempt to manipulate search engine results or distribute content through a large number of intermediary pages, ultimately leading to malicious destinations.

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.ru/pify?keyword=chapter+31+phlebotomy+answers
    • http://files.antlers2fins.com/uploads/1/3/1/8/131856330/2145572.pdf
    • http://files.uoflphisigmarho.com/uploads/1/3/0/7/130775292/vanasi-jiputaginadur.pdf
    • http://files.julioespinosamusic.com/uploads/1/3/1/1/131163738/845cf.pdf
    • https://cdn.shopify.com/s/files/1/0432/7214/3001/files/55329923599.pdf
    • https://cdn.shopify.com/s/files/1/0433/5370/2550/files/gaguriloluvuzajox.pdf
    • https://cdn.shopify.com/s/files/1/0437/6828/3287/files/41374541575.pdf
    • https://cdn.shopify.com/s/files/1/0433/5039/2984/files/wasonemorogani.pdf
    • https://cdn.shopify.com/s/files/1/0432/4045/6360/files/vabevojinakunogimisanuniz.pdf
    • https://cdn.shopify.com/s/files/1/0430/9303/3117/files/80338701337.pdf
    • https://cdn.shopify.com/s/files/1/0435/2281/8200/files/99503593851.pdf
    • https://cdn.shopify.com/s/files/1/0434/9090/2166/files/zututifesulemul.pdf
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/21486023912.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/lavuneni.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/78647185830.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/
    • https://cdn.shopify.com/s/files/1/0432/4045/6360/files/vabevojinakunogimisan

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b80.bin
9c01d1c488752b20b0fde6fd2504fd6c959782de368ecc043f1955ee129e782c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B80 5372 bytes
font_01_sfnt_off00007db7.bin
c50b12c4b67d6e005b28c7186b8c9ee994c957c4a2e9dc1d7a0a2ce2fd07bf55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB7 10180 bytes

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