Malicious PDF — malware analysis report

Static analysis result for SHA-256 efcddd733daefc69…

MALICIOUS

PDF

63.0 KB Created: 2020-07-24 20:16:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3be61520c56b794fb97d40e337b9ce98 SHA-1: 06800d23d47252b36062526bbdbfe4823315d12d SHA-256: efcddd733daefc6983e0841a18e446599a48c5b9600b01ad0ad5aa85a7c5b00e
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with the heuristic PDF_SEO_LINK_FARM indicating a link farm of 28 external PDF links. One of these links, https://ttraff.ru/pify?keyword=nikon+capture+nx-+d+manual, is flagged as a malicious redirector. This suggests the document's primary purpose is to lure users into clicking these links, potentially leading to malicious sites.

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=nikon+capture+nx-+d+manual
    • http://files.amystephenmusic.com/uploads/1/3/0/7/130775186/c2371f7e1e.pdf
    • http://files.activefittraining.com/uploads/1/3/0/8/130814216/fe75e5f5a.pdf
    • http://files.millennialtraveleats.com/uploads/1/3/2/3/132302919/3901844.pdf
    • http://files.eudoniaacademy.org/uploads/1/3/1/8/131857421/zazuveke-palobajogaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/1431/5422/files/nawanemizewubavazoziw.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/gamikepogibemalewoju.pdf
    • https://cdn.shopify.com/s/files/1/0436/3727/6825/files/11796700253.pdf
    • https://cdn.shopify.com/s/files/1/0431/0525/5586/files/dejox.pdf
    • https://cdn.shopify.com/s/files/1/0429/5219/6249/files/fonujaseredamiw.pdf
    • https://cdn.shopify.com/s/files/1/0441/0834/9592/files/womimitomukivosorur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9386/9223/files/zenojib.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0072/files/buwagufasimupik.pdf
    • https://cdn.shopify.com/s/files/1/0435/5306/3063/files/30140743894.pdf
    • https://cdn.shopify.com/s/files/1/0439/8222/5566/files/90063276871.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_off0000baa6.bin
7553619a3b5dc71f7e0690e3fd773b8d4b55b22e2d2c16b743fd06bb063d764e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAA6 5056 bytes
font_01_sfnt_off0000cbbf.bin
c67456c93a03e6f3fe92e741c0694b6a44b735914290624062fb8dc7b23fdfed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBBF 10380 bytes

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