Malicious PDF — malware analysis report

Static analysis result for SHA-256 478a1c32988c76d7…

MALICIOUS

PDF

37.9 KB Created: 2020-07-26 12:23:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f7112fca051fa43ebd2ce6f43da723b SHA-1: 90f65b3a867f6742f09fc81a15996fed803bf48f SHA-256: 478a1c32988c76d79969b0e94ee58ea76bf287876bac3f3561b18fb4f0d0ce5e
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is part of a link farm strategy. The document body, though heavily obfuscated, contains keywords related to the embedded URL, suggesting a lure to generate traffic. No scripts were extracted from this sample.

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=picsart+background+images+full+hd
    • http://files.charlottedixon.net/uploads/1/3/1/4/131453249/xufite.pdf
    • http://files.grandmaceilshouse.com/uploads/1/3/1/4/131408529/92347f03614c5.pdf
    • http://files.mittensforkittensrescue.com/uploads/1/3/0/8/130874614/97f413b52003.pdf
    • https://cdn.shopify.com/s/files/1/0432/1656/8482/files/91317904351.pdf
    • https://cdn.shopify.com/s/files/1/0432/7623/9014/files/27452315800.pdf
    • https://cdn.shopify.com/s/files/1/0433/7860/6229/files/mojonogatapojikagelugixep.pdf
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/51057407461.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94448736580.pdf
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/54158247274.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/72659330887.pdf
    • https://cdn.shopify.com/s/files/1/0428/4953/4111/files/vitabovanibev.pdf
    • https://cdn.shopify.com/s/files/1/0429/6753/1673/files/47947096109.pdf
    • https://cdn.shopify.com/s/files/1/0435/8648/6440/files/negajegadebig.pdf
    • https://cdn.shopify.com/s/files/1/0437/3502/3770/files/46182728197.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b6d.bin
bf3910535e60e91778872a10faf68f84968616e4ab1efa76793560e3674b5a04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B6D 5520 bytes
font_01_sfnt_off00006df7.bin
cf2179052703e85d61564b3266a2a4c8f1e4a29b8587d8a52aa01ede8a3c6d98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF7 8492 bytes

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