Malicious PDF — malware analysis report

Static analysis result for SHA-256 b40120dcaa595ee9…

MALICIOUS

PDF

43.3 KB Created: 2020-08-09 17:21:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 927f1a97afdf9f8581e129f23e5bf630 SHA-1: e7aaa9e24e3a914842d163fa165989b6975b7c36 SHA-256: b40120dcaa595ee9d3bf85a9ef4c6394d60b9e47ab48128f1dd4afb6d8ccf0ac
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL is https://ttraff.ru/pify?keyword=immunization+and+cold+chain+management+pdf, which likely serves as a lure to a malicious payload. The document body itself is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf.

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=immunization+and+cold+chain+management+pdf
    • http://files.uninetimg.com/uploads/1/3/0/7/130776221/8437887.pdf
    • http://files.406techteacher.com/uploads/1/3/1/4/131438234/tiwolemoxojadifu.pdf
    • http://sawulet.michaeljohnsonhs.com/uploads/1/3/0/8/130814328/pijodatuvemimivizide.pdf
    • http://files.karenchickfineart.com/uploads/1/3/0/7/130739443/22995861.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/90795063911.pdf
    • https://cdn.shopify.com/s/files/1/0436/5503/7093/files/kaponabit.pdf
    • https://cdn.shopify.com/s/files/1/0429/4557/7116/files/wafesojazopeburizawu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0195/3952/files/teguperajudir.pdf
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/tojijutejabusekope.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/nekufovoveme.pdf
    • https://cdn.shopify.com/s/files/1/0434/6078/8390/files/brain_teasers_puzzle.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/airframe_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/351399324.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30347825404.pdf
    • https://cdn.shopify.com/s/files/1/0437/7634/4225/files/27815726962.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9379/files/jevesak.pdf
    • https://cdn.shopify.com/s/files/1/0438/1864/7709/files/ferudetamutunaluloz.pdf
    • https://cdn.shopify.com/s/files/1/0435/7334/6463/files/k_lite_codec.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_off00006a39.bin
51949f8d4548b232fd6bfa0d65cc971765b655a28ba8bfe25d56b39146744f5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A39 5284 bytes
font_01_sfnt_off00007c1d.bin
c8615e011528dbae00c1a1492336696ab2ae9da451893fc0fd11e60bbaabf02a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C1D 10388 bytes

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