Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c11bb532317e304…

MALICIOUS

PDF

43.0 KB Created: 2020-08-13 17:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99f1e2660cd6692e9759b50f04535cd7 SHA-1: 610eaf3db4ff7e9d56d1d25ac235e2bbd79507b4 SHA-256: 2c11bb532317e3041a191c3226154fe5b1172c3e735ae60792bd9c717f727379
150 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, with one specifically identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a link farm or content distribution network for malicious files. The ML classifier strongly supports the malicious verdict. The primary malicious IOC is the redirector URL.

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/wb?keyword=basic%20rules%20and%20regulations%20of%20athletics%20pdf
    • http://files.jasonfranklin55.com/uploads/1/3/1/6/131636781/tekekasalepika-kubizadeze-risawit.pdf
    • http://xofatigix.delloewenthalphotography.com/uploads/1/3/0/7/130775320/1995710.pdf
    • http://files.tangns.ie/uploads/1/3/1/8/131871484/pemelinikolevebinuba.pdf
    • http://zuminup.michellelashier.com/uploads/1/3/1/4/131453247/6099aa04cc5d7.pdf
    • https://cdn.shopify.com/s/files/1/0429/3417/3859/files/aviones_de_papel_libro_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/69805997688.pdf
    • https://cdn.shopify.com/s/files/1/0452/6142/2753/files/81537837705.pdf
    • https://cdn.shopify.com/s/files/1/0439/0486/0328/files/dd_national_live.pdf
    • https://cdn.shopify.com/s/files/1/0435/3464/7460/files/cylindrical_equal_area_projection.pdf
    • https://cdn.shopify.com/s/files/1/0428/2230/3911/files/imran_khan_youth_loan_scheme_2020_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/2009/0535/files/zasodaj.pdf
    • https://cdn.shopify.com/s/files/1/0438/3784/9762/files/81992699857.pdf
    • https://cdn.shopify.com/s/files/1/0431/3602/4737/files/the_doors_of_stone.pdf
    • https://cdn.shopify.com/s/files/1/0438/4702/4805/files/vomoral.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/jujuwewak.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_off000069b3.bin
f561347ce06aa9ee27cfb09fc8a81e36d9a0a32ced07d7d48626e6959368a41f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B3 5468 bytes
font_01_sfnt_off00007c3c.bin
d3460bdb4e746cd30425d1b5d78aa329affd7c31ef372bf1f99d916a7361fa25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C3C 10148 bytes

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