Malicious PDF — malware analysis report

Static analysis result for SHA-256 84d6d71718b95a2e…

MALICIOUS

PDF

66.6 KB Created: 2020-08-10 00:40:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 756d53288fa6a2ace7bed35cca17ecc6 SHA-1: 56fd0c0ebd55e603fbc071075047ab1e9f41be00 SHA-256: 84d6d71718b95a2efcb2e40eb14ef8578cb6f952c002cd5ea01563224c6b48ac
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary link, https://ttraff.cc/pify?keyword=approximation+algorithms+and+semidefinite+programming+pdf, is designed to lead users to potentially harmful content. The document body, though heavily obfuscated, contains this URL and other links pointing to external PDFs, suggesting a link farm or redirection tactic to distribute malware or phishing content.

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.cc/pify?keyword=approximation+algorithms+and+semidefinite+programming+pdf
    • http://files.bureaunl.com/uploads/1/3/2/6/132695730/kiwekokuruloz_gezef.pdf
    • http://files.henryfusco.com/uploads/1/3/0/9/130969992/warajazunuz.pdf
    • http://mizozoz.myangerundercontrol.net/uploads/1/3/1/0/131070152/pudibisad.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8711/files/manujaxokurox.pdf
    • https://cdn.shopify.com/s/files/1/0431/1826/4469/files/aide_mmoire_anglais.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/alfabet_po_angielsku_wymowa.pdf
    • https://cdn.shopify.com/s/files/1/0439/0027/2792/files/33590415003.pdf
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/werigaxupila.pdf
    • https://cdn.shopify.com/s/files/1/0434/9073/8328/files/87625098680.pdf
    • https://cdn.shopify.com/s/files/1/0433/4243/0362/files/angielski_sownictwo_chomikuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/8817/5513/files/77283248295.pdf
    • https://cdn.shopify.com/s/files/1/0451/0292/3939/files/akhand_jyoti_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/2282/7165/files/lujunuror.pdf
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/90000814408.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_off00009f8d.bin
80d6d9bbb4d0d430cfb527535d2df851f31743c18b2c56678ca201ff3a8845c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F8D 5512 bytes
font_01_sfnt_off0000b221.bin
930c72cd755e5d33cb0e620cfa5e9542b966adc67623f5f9769d7cba6661ff4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB221 15964 bytes
font_02_sfnt_off0000e371.bin
aa830a663b780f723d7660a38ae6cb97e10967eedb11c3a65d9738ce7c9248ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE371 16628 bytes

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