Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f977e2fb92a6c8e…

MALICIOUS

PDF

41.6 KB Created: 2020-08-11 05:24:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c22d52ea5ce601c9ace5b02ee78f6d5 SHA-1: 3c57fc1986085d277d7796951a859f56fca3d2e8 SHA-256: 8f977e2fb92a6c8e0b06c3e07badace3e8df7d646083bc7c665ba5ff616bc82f
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=pdf+ausf%25C3%25BCllen+und+unterschreiben+android'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The document body, though partially garbled, contains text suggesting it's a form to be filled and signed, aligning with a phishing or scam lure. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility.

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=pdf+ausf%25C3%25BCllen+und+unterschreiben+android
    • http://files.infoodandfuel.org/uploads/1/3/1/1/131163559/vomuf.pdf
    • http://files.mcccil.org/uploads/1/3/0/7/130740069/46670.pdf
    • http://files.support.famhealth.com/uploads/1/3/1/4/131437740/3357936.pdf
    • http://files.fengshuidiscovery.com/uploads/1/3/1/3/131398099/1e464246.pdf
    • https://cdn.shopify.com/s/files/1/0435/4031/6319/files/36411195290.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1125/files/41898416036.pdf
    • https://cdn.shopify.com/s/files/1/0430/6278/8245/files/xebudopesabenusukubo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2156/5078/files/latex_hide_text.pdf
    • https://cdn.shopify.com/s/files/1/0438/6563/7019/files/vanazufedana.pdf
    • https://cdn.shopify.com/s/files/1/0432/7568/1947/files/applied_research_examples.pdf
    • https://cdn.shopify.com/s/files/1/0433/5301/4423/files/49889950856.pdf
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/pujenerenekibifi.pdf
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/class_11_chemistry_state_board_books_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/7628/0729/files/xibuzagiteguwuno.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_off00006259.bin
632d723a1210d8d0e0e4420b7b5d7d026d05de8ef343a1cc16f43deca02f4e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6259 5372 bytes
font_01_sfnt_off0000744e.bin
d174f194b201fa85b0fdd585442b63fa0dfcbc8b7f9e8473fc7a569d9822619d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x744E 10720 bytes

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