Malicious PDF — malware analysis report

Static analysis result for SHA-256 c99a4a479dc392a4…

MALICIOUS

PDF

74.7 KB Created: 2020-07-29 15:22:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ca69d93280a7da0a6dbfa8e8b4e40ea SHA-1: f853435dfc50462f35e610fcf5a95a160dc187da SHA-256: c99a4a479dc392a436439f188076e331333a4564b9378285fb92e86be8be85c7
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, identified as a 'PDF SEO Link Farm'. One critical heuristic indicates a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=arkitekturang+filipino+pdf'. This suggests the document is designed to drive traffic to potentially malicious or unwanted websites, possibly for SEO poisoning or to serve further malicious content. No scripts were extracted, and the document body was heavily obfuscated.

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=arkitekturang+filipino+pdf
    • http://files.saskatoonnutanalions.com/uploads/1/3/0/7/130739146/4554800.pdf
    • http://files.sweetteasweettreats.com/uploads/1/3/1/4/131408245/3283174.pdf
    • http://files.bourkeconstructionoc.com/uploads/1/3/2/7/132740260/pojixezagome.pdf
    • http://files.mrhansas.com/uploads/1/3/1/3/131378771/mamifumul.pdf
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/24438619160.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5396/files/welomerexaki.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81236671698.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/51696191064.pdf
    • https://cdn.shopify.com/s/files/1/0431/5119/6315/files/timatusozigunovitem.pdf
    • https://cdn.shopify.com/s/files/1/0430/0134/8255/files/11207925286.pdf
    • https://cdn.shopify.com/s/files/1/0438/0845/6865/files/wiwutelufedafefubolemazom.pdf
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/24860561888.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/susuto.pdf
    • https://cdn.shopify.com/s/files/1/0439/3458/0891/files/21759283171.pdf
    • https://cdn.shopify.com/s/files/1/0429/2031/2991/files/4072354534.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63912397784.pdf
    • https://cdn.shopify.com/s/files/1/0435/1731/3176/files/23330959073.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_off0000de1b.bin
30784ef2e3911892bcaff8261ae217720a2011f121325d19d5e881fec80a9e5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1B 4964 bytes
font_01_sfnt_off0000ef0b.bin
49e592dcc68ab9e5b94c664360f024ab916eef656124ba7e02bcc70955c61b7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0B 14856 bytes

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