Malicious PDF — malware analysis report

Static analysis result for SHA-256 da8ed35fb031a40a…

MALICIOUS

PDF

43.5 KB Created: 2020-08-23 22:33:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93a5d1c5b603299431763385f533b72a SHA-1: 616977d0526eaf51ead1c467d7222a38510e1423 SHA-256: da8ed35fb031a40a2939a4d8983ad3baaabd35a8ffd806e8a37feb0df51a38e1
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though partially corrupted, contains text related to 'bksb initial assessment answers english', suggesting a lure to trick users into clicking the malicious link. The primary malicious URL is https://ttraff.cc/pify?keyword=bksb+initial+assessment+answers+english, which is likely used to redirect the user to a phishing or scam page.

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=bksb+initial+assessment+answers+english
    • http://files.roxyguitar.com/uploads/1/3/1/1/131163851/e1400e6e95.pdf
    • http://setol.enviscid.com/uploads/1/3/1/3/131379578/69298.pdf
    • https://cdn.shopify.com/s/files/1/0432/7401/0782/files/bitimurobi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0188/8416/files/tenerevevolepufepodo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0300/2523/files/gmat_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/7231/4778/files/jomimiwikufag.pdf
    • https://cdn.shopify.com/s/files/1/0430/3480/4375/files/92987773948.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9621/files/funeral_service_program_template_word.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/mekapezezaguvigu.pdf
    • https://cdn.shopify.com/s/files/1/0436/3550/7358/files/epistaxis_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kubogofire.pdf
    • https://cdn.shopify.com/s/files/1/0437/8089/8973/files/31708741627.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/26323867422.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_off00006cbe.bin
51893ada148c4c99647324709804b96ce0af3533d49201f9492f72d6f093322a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBE 5444 bytes
font_01_sfnt_off00007f22.bin
fd55235766a3e519145e18f647edfaec154d38229961d03597ee2103a7a0efa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F22 9980 bytes

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