Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a8c44549fa260f9…

MALICIOUS

PDF

32.4 KB Created: 2020-08-30 12:21:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 503ced2ad77f3c8b88c691d8d710d6be SHA-1: b9c82a5e057c41233b8c6c08792d70b250879e41 SHA-256: 3a8c44549fa260f924c40590cfad450ac300acc764be86762eefe961c85b7ed8
120 Risk Score

Malware Insights

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

The PDF file contains a deceptive title 'Lvoa-c bad news' and embeds a large number of external links, including one pointing to a known malicious redirector at 'https://ttraff.ru/wix?keyword=lvoa-c+bad+news'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the malicious nature of this URL. The 'PDF_SEO_LINK_FARM' heuristic indicates the document is designed to host many links, likely for SEO manipulation or to distribute malicious content. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

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/wix?keyword=lvoa-c+bad+news
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/namumuwaxizidipe.pdf
    • https://cdn.shopify.com/s/files/1/0436/6086/9785/files/spanish_to_english_translation_document.pdf
    • https://cdn.shopify.com/s/files/1/0437/1293/8152/files/cabotagem_no_brasil.pdf
    • https://cdn.shopify.com/s/files/1/0429/0193/0143/files/sikaxejesejep.pdf
    • https://cdn.shopify.com/s/files/1/0431/7026/7291/files/xigavotaduluvirorupeser.pdf
    • https://cdn.shopify.com/s/files/1/0428/4396/3559/files/jejizudakuvolekexituve.pdf
    • https://cdn.shopify.com/s/files/1/0435/4523/1509/files/american_sign_language_dictionary_third_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1734/files/mulojiliwinini.pdf
    • https://cdn.shopify.com/s/files/1/0436/8151/3625/files/types_of_balances_in_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/91205307371.pdf
    • https://cdn.shopify.com/s/files/1/0452/4336/7581/files/capital_punishment_pros_and_cons.pdf
    • https://cdn.shopify.com/s/files/1/0432/8590/5576/files/givinoxuzuvagow.pdf
    • https://cdn.shopify.com/s/files/1/0439/5129/2584/files/88522477362.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_off00004343.bin
4e1bdf5a3d92ff3f6c917378cf6a3d6b8d23acc997b348c2cb9a44978d825af0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4343 5072 bytes
font_01_sfnt_off000054b3.bin
f97ce63e6ef152d16b84c68d5f4219cb04dcef6cf5f9f0176d5e520af70cf749		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54B3 9568 bytes

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