Malicious PDF — malware analysis report

Static analysis result for SHA-256 3be4d1cef71aa66e…

MALICIOUS

PDF

45.6 KB Created: 2020-08-03 11:55:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cdc9bbf7da7648d67fbf7beea014932 SHA-1: 850566c1c2d57d2f8e3439995a4accb3730b4835 SHA-256: 3be4d1cef71aa66e98c8215b0423184fb92a97a983b3ba066736d238a70a5be3
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as an actuarial valuation report. The document body, though heavily obfuscated, contains the URL that leads to the malicious redirector. The PDF also hosts a large number of external links, many pointing to Shopify domains, likely as part of a link farm to improve search engine ranking for malicious content. The primary malicious URL is https://ttraff.cc/pify?keyword=actuarial+valuation+report+pdf.

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.cc/pify?keyword=actuarial+valuation+report+pdf
    • http://files.laura-walters.com/uploads/1/3/2/6/132682070/vojajapar_zezubogofote.pdf
    • http://files.askafinnishteacher.com/uploads/1/3/1/4/131453053/xozigareni.pdf
    • http://files.giveinfulltoday.org/uploads/1/3/1/4/131406269/javurusu.pdf
    • http://files.fellowshipburford.com/uploads/1/3/1/4/131453805/9469218.pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/medotosunedelubob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13336488851.pdf
    • https://cdn.shopify.com/s/files/1/0432/9324/5590/files/78937551522.pdf
    • https://cdn.shopify.com/s/files/1/0431/6640/0663/files/16945513991.pdf
    • https://cdn.shopify.com/s/files/1/0437/5173/5448/files/fujesudaposa.pdf
    • https://cdn.shopify.com/s/files/1/0429/0537/0787/files/vebixefiwobepun.pdf
    • https://cdn.shopify.com/s/files/1/0432/9209/8724/files/jopuvivezatebuwakonoram.pdf
    • https://cdn.shopify.com/s/files/1/0428/0808/2598/files/gadobowalapivazomomemojip.pdf
    • https://cdn.shopify.com/s/files/1/0429/6189/5587/files/tuwevimoferotekonu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0177/4233/files/30806589547.pdf
    • https://cdn.shopify.com/s/files/1/0428/7181/6358/files/68534396277.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0657/files/66961188923.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_off00006ed1.bin
defc45d02baa9536066385c641f30b4871e6406e248acb39b4fada855fc30928		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED1 5020 bytes
font_01_sfnt_off00008001.bin
714d30966e4a325198d3dc2877e93a4fcc73086990e908781969b8b17b20f325		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8001 13116 bytes

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