Malicious PDF — malware analysis report

Static analysis result for SHA-256 af5a7d340fde0fc0…

MALICIOUS

PDF

35.3 KB Created: 2020-08-14 21:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 568793a0853bbec6ec55acd83cc4a698 SHA-1: 7f430a2a4b74091ce0077530f6359e6427c387ec SHA-256: af5a7d340fde0fc018fc19630cbe91e8bc760b6968cee14453217b762f45bbc8
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, directing users to 'ttraff.cc'. The document body, though heavily obfuscated, contains references to the same URL and a large number of other PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The primary intent appears to be redirecting users to malicious infrastructure under the guise of providing a document.

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/wb?keyword=nfpa%2072%202016%20record%20of%20completion%20pdf
    • http://files.kquattrin.com/uploads/1/3/2/7/132712163/578642.pdf
    • http://sopaka.honest-elections.com/uploads/1/3/1/6/131636725/2719504.pdf
    • http://files.greenrivermwc.com/uploads/1/3/1/6/131607407/jovotuzasivof.pdf
    • https://cdn.shopify.com/s/files/1/0430/8254/7361/files/17903953956.pdf
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/kevilefamubos.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3592/files/39803333354.pdf
    • https://cdn.shopify.com/s/files/1/0430/1137/5267/files/zazajebavotudupuwabim.pdf
    • https://cdn.shopify.com/s/files/1/0438/0547/4978/files/67112070402.pdf
    • https://cdn.shopify.com/s/files/1/0437/7985/0398/files/company_letterhead.pdf
    • https://cdn.shopify.com/s/files/1/0436/0273/9362/files/18969340997.pdf
    • https://cdn.shopify.com/s/files/1/0436/1850/0765/files/desmosomes_and_hemidesmosomes.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/libros_sobre_alimentacion_saludable.pdf
    • https://cdn.shopify.com/s/files/1/0428/5428/5479/files/zutujipuraxir.pdf
    • https://cdn.shopify.com/s/files/1/0436/5841/2185/files/php_generate_from_html.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_off00004c85.bin
8e3645d97037a00302cd22d89d26fbc0272c8dba6b4af5f3ef91621f4aadb8da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C85 5652 bytes
font_01_sfnt_off00005fad.bin
bf50646e04c650f62287ab09b60f398167df13d6fa4d9a84699edc1cdfc77518		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAD 9688 bytes

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