Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec9d17b6f420b6dc…

MALICIOUS

PDF

45.6 KB Created: 2020-08-04 09:25:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af715214820ce37715de1aedc84e3110 SHA-1: ccd36cb7cfd05982788f67921420d2100a6a8dfe SHA-256: ec9d17b6f420b6dc13aaecde58955b64a4495e2e531fb43e41465d4e20028647
150 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, identified as a link farm, designed to redirect users to various external resources. One of the primary malicious links identified is https://ttraff.ru/pify?keyword=blowfish+encryption+algorithm+pdf, which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other Shopify-hosted PDF links, suggesting a coordinated effort to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=blowfish+encryption+algorithm+pdf
    • http://files.danvillepd.org/uploads/1/3/1/0/131071114/3474080.pdf
    • http://files.fitupfabrication.com/uploads/1/3/0/8/130814984/3404370.pdf
    • http://files.jillkerttula.com/uploads/1/3/0/8/130814121/4c252d6b7042.pdf
    • http://files.riskinpractice.co.uk/uploads/1/3/2/3/132303151/wideluf_fapimi_gitomopunuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/palafabinogedewimifot.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6165/files/fasavugipumugasefogurifi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5494/6721/files/pumizarigusejemunezoki.pdf
    • https://cdn.shopify.com/s/files/1/0438/0763/7661/files/ford_fusion_2006_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/7158053499.pdf
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/1271623551.pdf
    • https://cdn.shopify.com/s/files/1/0432/2630/0575/files/81171269775.pdf
    • https://cdn.shopify.com/s/files/1/0437/4344/5141/files/20838532954.pdf
    • https://cdn.shopify.com/s/files/1/0436/9340/8409/files/unir_archivos_ilovepdf.pdf
    • https://cdn.shopify.com/s/files/1/0429/4252/9695/files/4856866029.pdf
    • https://cdn.shopify.com/s/files/1/0433/3443/4974/files/belesonogulin.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_off0000643c.bin
6250c67830c7aeef2db532de42a863bc5ff9727609676bf1d6f2619bef96fd06
pdf-font-stream PDF embedded font (sfnt) at offset 0x643C 3044 bytes
font_01_sfnt_off00006f1b.bin
9bc1dba96a5218e35058de39741eaf785d0bb877da539068195d271796012665
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1B 5812 bytes
font_02_sfnt_off000082e0.bin
c7c77b6cfbed18a83864a0ac20d1e219663674cc8b3893181b204e55d5b63e99
pdf-font-stream PDF embedded font (sfnt) at offset 0x82E0 11256 bytes