Malicious PDF — malware analysis report

Static analysis result for SHA-256 289ffa93de801807…

MALICIOUS

PDF

45.0 KB Created: 2020-08-06 20:16:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b904d88f978e18394bcc10ac9521e12f SHA-1: dddee389b4a7c8dd4d9acde9831a2b56fbd1f014 SHA-256: 289ffa93de801807097c16e15598b7ce607363e13f2c86bc6c7f05d61606b834
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to a known malicious redirector, ttraff.com, which is disguised as a document about trade agreements. The file also exhibits characteristics of a PDF SEO link farm, with numerous links to other PDFs hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be luring the user to click on the malicious link within the document.

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=tratados+y+acuerdos+comerciales+de+mexico+pdf
    • http://files.cloudninetherapies.co.uk/uploads/1/3/0/7/130776033/bavunaxor-zapopap.pdf
    • http://files.vcstemposium.org/uploads/1/3/2/6/132695200/ebabdb54f90.pdf
    • http://files.emmais.ca/uploads/1/3/1/3/131381414/9761575.pdf
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/16062925129.pdf
    • https://cdn.shopify.com/s/files/1/0434/6868/5464/files/fexip.pdf
    • https://cdn.shopify.com/s/files/1/0437/7581/9927/files/android_2._3_6_download_zip.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1777/files/segukimazopomukoranevog.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/ketazevelijujo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kawovuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/5937/9357/files/naxuzozugos.pdf
    • https://cdn.shopify.com/s/files/1/0434/0436/1895/files/31251416338.pdf
    • https://cdn.shopify.com/s/files/1/0437/7529/5640/files/virtual_desktop_oculus_quest.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/sepufeju.pdf
    • https://cdn.shopify.com/s/files/1/0427/5883/2294/files/que_es_preeclampsia_en_el_embarazo.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_off00006296.bin
3e46119bce0561db1bffe7bcfc77d91126b1bce8853a9c9fc746083650e929d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6296 5420 bytes
font_01_sfnt_off000074fc.bin
d903d012792fff7be83552d6d7479c65dd3ea27c504e1808d016af4db52ee4a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74FC 15996 bytes

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