Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6fa0ce4d385cbf0…

MALICIOUS

PDF

47.2 KB Created: 2020-07-30 22:08:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0303cb49281ddaa2f01b773acaf7a22e SHA-1: eae36267b40e3acbb4706d26e3e89aa65449779f SHA-256: c6fa0ce4d385cbf0d0876fcd3fa9d1eb97d4d08d605cde8c6a5ddd044c78c1eb
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. One critical heuristic firing indicates a direct link to known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'punctuation correction worksheets pdf', suggesting a lure to trick users into clicking the malicious links. The presence of numerous Shopify-hosted PDFs, while some are marked benign, is part of a broader link-farming strategy.

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=punctuation+correction+worksheets+pdf
    • http://files.patagoniafallfestival.org/uploads/1/3/0/7/130776327/rufolaxuzur.pdf
    • http://files.liturgicalreflection.com/uploads/1/3/0/7/130740017/e7c65d671.pdf
    • http://files.wanderingsolace.com/uploads/1/3/1/4/131453252/roradi_famupafe.pdf
    • http://files.villagevoiceschoir.net/uploads/1/3/0/7/130739062/6223390.pdf
    • https://cdn.shopify.com/s/files/1/0437/9328/5277/files/lolijijujatuxi.pdf
    • https://cdn.shopify.com/s/files/1/0438/9437/4555/files/xozegowirizilapomik.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0994/files/54307000988.pdf
    • https://cdn.shopify.com/s/files/1/0432/8076/0990/files/lejijizonafoxerefuwalok.pdf
    • https://cdn.shopify.com/s/files/1/0434/2883/9581/files/pamotapofozikitukifaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4711/files/gizakufumog.pdf
    • https://cdn.shopify.com/s/files/1/0428/7194/7430/files/dotexesakesapifigakog.pdf
    • https://cdn.shopify.com/s/files/1/0436/3013/3406/files/73211535461.pdf
    • https://cdn.shopify.com/s/files/1/0428/7266/8319/files/95154436621.pdf
    • https://cdn.shopify.com/s/files/1/0437/9593/9488/files/mijekon.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/zaxipanudulixepugijivame.pdf
    • https://cdn.shopify.com/s/files/1/0436/4664/8473/files/84026934881.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/nokitidexojixajozojuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/41115346467.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1681/files/xoxosaludepo.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/1/0431/1692/0994/files/5430

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ac1.bin
9127aa0eaaea2ce3d162be79e24a51fbb414eaa863c6f82f0ef233ad18976648
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC1 5248 bytes
font_01_sfnt_off00008c9a.bin
604eebfc9bf22be8e1daf23006ad9ac99f5051be0b40b5ce6668a4fe02291d6f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C9A 10148 bytes