Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d4db6992d64b578…

MALICIOUS

PDF

44.4 KB Created: 2020-08-20 20:40:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe6849440855e07c180be4d9fa39b090 SHA-1: 8a3a80f50e32041b25e3d930dd3008fd320fcf77 SHA-256: 1d4db6992d64b578ca8ee275a2e9c8f8130754424eb72cf68e1f5f5c9a1f6165
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=cissp+certification+exam+format'. The document body, though heavily obfuscated, contains text related to CISSP certification, suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely to obscure the malicious redirector. The primary malicious IOC is the redirector URL.

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=cissp+certification+exam+format
    • http://files.vcaec.org.uk/uploads/1/3/1/4/131452977/4d42f.pdf
    • https://cdn.shopify.com/s/files/1/0432/4930/3720/files/symmetry_worksheets_grade_1.pdf
    • https://cdn.shopify.com/s/files/1/0434/5665/9621/files/86589266902.pdf
    • https://cdn.shopify.com/s/files/1/0437/4138/0769/files/napamegodewib.pdf
    • https://cdn.shopify.com/s/files/1/0459/6999/7984/files/search_chrome_ipad.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/38956801613.pdf
    • https://cdn.shopify.com/s/files/1/0428/9373/8143/files/89033600175.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/mamibobozoladedadusimobe.pdf
    • https://cdn.shopify.com/s/files/1/0435/2652/0987/files/udp_9._rarbg._com_2710_announce.pdf
    • https://cdn.shopify.com/s/files/1/0430/4352/0665/files/ziwakafomuko.pdf
    • https://cdn.shopify.com/s/files/1/0443/3071/3244/files/antipsychotic_medications_list.pdf
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/lasipeva.pdf
    • https://cdn.shopify.com/s/files/1/0436/2479/2224/files/97816478681.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006359.bin
e1e23deed3f6df4394b68adebf0695fcf2f52ecb5222c2dfbf8a79651ae17ed5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6359 5008 bytes
font_01_sfnt_off00007444.bin
4f552f115c882731d54df82537bae1d2bf724f784038a066bd15650a137f8f4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7444 10080 bytes
font_02_sfnt_off000096c6.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96C6 4324 bytes

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