Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2b5a2541c548b09…

MALICIOUS

PDF

43.7 KB Created: 2020-08-10 02:43:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9da25446f86fe9eefb331a1623aa603 SHA-1: 7adb0bfd94051bc2d73ab430e1aa04ad358facc6 SHA-256: c2b5a2541c548b09a06f4c4d304cfc5b6e35903dee100c5d2ce6c24aed0f66c6
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though partially garbled, contains the same URL and a plausible lure related to 'cancer de pancreas nutricion pdf'. This indicates the PDF is designed to redirect users to malicious infrastructure, likely for further exploitation or phishing. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious 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.com/pify?keyword=cancer+de+pancreas+nutricion+pdf
    • http://files.danafosmer.com/uploads/1/3/2/8/132816165/414b7a48a22.pdf
    • http://files.vcgallery.org/uploads/1/3/1/8/131856381/rokererukirejakifu.pdf
    • http://voxituwa.peoplesresponseteamchicago.org/uploads/1/3/1/3/131384429/xulizorafakepoveziz.pdf
    • http://files.drcolinadunbar.com/uploads/1/3/1/4/131453605/zulomemasurabexele.pdf
    • http://files.michimathias.com/uploads/1/3/0/9/130969446/vobebiwarofab.pdf
    • https://cdn.shopify.com/s/files/1/0435/5411/1656/files/35352711695.pdf
    • https://cdn.shopify.com/s/files/1/0440/1207/7206/files/materi_avertebrata_air.pdf
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/24552412999.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/47718062116.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9444/files/buberibi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/metegemekipezafekude.pdf
    • https://cdn.shopify.com/s/files/1/0429/1071/1971/files/zibofam.pdf
    • https://cdn.shopify.com/s/files/1/0437/0792/4635/files/luponikikepoweze.pdf
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/sasapikexugelasi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/10243476159.pdf
    • https://cdn.shopify.com/s/files/1/0429/3469/8147/files/26858032033.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_off000063c2.bin
337dfb48b25ee1f9ce24aced7c614f8d779aebed95d45ee6c4b928cb9dbaeeca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63C2 5024 bytes
font_01_sfnt_off000074e2.bin
e872d9dd5ace1b9bf0b8438154a883035509452b033b54631739f57faa60abef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E2 14408 bytes

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