Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd4f4227ff45226b…

MALICIOUS

PDF

46.1 KB Created: 2020-07-10 07:16:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8859b8a66a88a25b7d755d99aa4a7319 SHA-1: 9206993e4858993415e63ef3a67c426361c33418 SHA-256: bd4f4227ff45226bfbdb1ff915b1faf157c95f1f87bfc11ff9918a2c72a68a04
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic firing indicates the PDF links to known malicious redirector infrastructure. The document body, though partially corrupted, contains the URL https://ttraff.ru/wb?keyword=action%20verbs%20list%20pdf, suggesting a lure to a site that likely distributes further malicious content or conducts phishing. The presence of numerous SEO-optimized PDF links indicates a link farm designed to attract traffic and potentially distribute malware.

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/wb?keyword=action%20verbs%20list%20pdf
    • http://files.sherirobersonhorsemanship.com/uploads/1/3/1/4/131413222/feluzuduxilu.pdf
    • http://files.thecherryspringsranch.com/uploads/1/3/1/6/131606674/6205286.pdf
    • http://files.rx-leather.com/uploads/1/3/1/6/131606762/furagup.pdf
    • http://files.iscad.co.uk/uploads/1/3/0/7/130740433/zegupabuwifos.pdf
    • http://files.isoandbusinessexpert.com/uploads/1/3/0/8/130813797/noxodak.pdf
    • http://files.hikinggrenouille.com/uploads/1/3/1/0/131070612/xazefigulif-segulu-guxerow.pdf
    • http://files.clouddanceralpacas.com/uploads/1/3/0/8/130813975/6696637.pdf
    • http://files.musemodelsdarwin.com/uploads/1/3/0/7/130739328/9543614.pdf
    • http://files.pfcmooremess.com/uploads/1/3/0/7/130776072/65264bc54.pdf
    • http://files.godswaytshirts.com/uploads/1/3/2/3/132302815/7c24d7928c8eda5.pdf
    • https://mupujinivibu.files.wordpress.com/2020/07/zefanu.pdf
    • https://watuwevizib.files.wordpress.com/2020/07/29391602121.pdf
    • https://zizebokebop.files.wordpress.com/2020/07/57342927138.pdf
    • https://budekukagok.files.wordpress.com/2020/06/54375456291.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wugituvunajobi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fejekav.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67142307476.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dewubi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/10699911966.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_off0000704f.bin
d1a92c4265963505a3d388ecfd752fc48d3791fff9763215871430640db07675
pdf-font-stream PDF embedded font (sfnt) at offset 0x704F 4916 bytes
font_01_sfnt_off00008104.bin
00b76e5bb67e1890b091327ae6364d5d54a9b7111ace9d1acd8c38c6eeab0d43
pdf-font-stream PDF embedded font (sfnt) at offset 0x8104 13580 bytes