Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb03a12b3bb8e1f3…

MALICIOUS

PDF

36.9 KB Created: 2020-08-06 17:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62e6bb779fc9d98b04a201061d5fca9b SHA-1: 06384cfa73d1efc5e0905066ce69637092d38aac SHA-256: fb03a12b3bb8e1f3453c49e47777f335e93069a8e89ef934f6753859028dfca4
120 Risk Score

Malware Insights

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

The PDF file contains a link farm of 15 external PDF links, with the primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the heuristic. This suggests a phishing or redirection attempt to a malicious site.

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=korean+language+in+nepali+pdf
    • http://files.chile-powder-adventures.com/uploads/1/3/1/6/131607062/087acf.pdf
    • http://files.jennymartinbooks.com/uploads/1/3/1/3/131398432/defepuvupositit-puzabeg.pdf
    • http://files.christchurchplaygrouphighbury.com/uploads/1/3/1/4/131483201/sinonejegikixuzoje.pdf
    • http://files.crowntownpictures.com/uploads/1/3/0/7/130739309/dutijupanotis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9206/files/35731400339.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0019/files/kajajafagigavetetod.pdf
    • https://cdn.shopify.com/s/files/1/0432/3544/2855/files/24494558551.pdf
    • https://cdn.shopify.com/s/files/1/0434/8909/9938/files/rotewaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/47375720291.pdf
    • https://cdn.shopify.com/s/files/1/0435/3831/7471/files/64860102178.pdf
    • https://cdn.shopify.com/s/files/1/0435/9494/0573/files/32259374849.pdf
    • https://cdn.shopify.com/s/files/1/0439/4863/8363/files/insert_pdf_file_in_word_document.pdf
    • https://cdn.shopify.com/s/files/1/0435/9212/2536/files/can_t_uninstall_avg.pdf
    • https://cdn.shopify.com/s/files/1/0432/6513/0658/files/arbitration_and_contract_law.pdf
    • https://cdn.shopify.com/s/files/1/0437/1329/8581/files/14095579307.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_off000052bd.bin
b5994cd56bfd30cdbf10eaa4bc8778d6173622a7aa5c40ac6db93c78260d6bb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52BD 5000 bytes
font_01_sfnt_off000063d5.bin
ded65b3546ef7bbe9d10ffa1582528efa766d09ba8cb57302ba13c3803bcf42e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63D5 10180 bytes

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