Malicious PDF — malware analysis report

Static analysis result for SHA-256 fffdd30432d93fd1…

MALICIOUS

PDF

46.2 KB Created: 2020-08-31 15:25:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8984758601a70bdfbdc4a38a66ae11db SHA-1: f50ab58d0f797a1e286403471512ffc1563fcced SHA-256: fffdd30432d93fd193cd7200e91e6730313b3098b758f0b439c9ed3a463e4317
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=xiaomi+bluetooth+4.+0+speaker+manual'. This indicates a phishing or scam attempt, likely to redirect users to a malicious site. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDF files hosted on static.usrfiles.com, suggesting a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. No scripts were extracted from this sample.

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/wix?keyword=xiaomi+bluetooth+4.+0+speaker+manual
    • https://static.usrfiles.com/ugd/b8c837_ba1c95c30cf7409fb381c6f1eafe6daf.pdf
    • https://static.usrfiles.com/ugd/f09a9d_d54831fd1eb345ac82f59a9643587dc8.pdf
    • https://static.usrfiles.com/ugd/b8c837_af64b28627cd4bec8224d9ecbae77549.pdf
    • https://static.usrfiles.com/ugd/4117a9_ab4bf30f26bb4c09b53cc8789fdb8471.pdf
    • https://cdn.shopify.com/s/files/1/0432/6758/8252/files/40189580090.pdf
    • https://cdn.shopify.com/s/files/1/0433/1975/4907/files/lesaripuwufavigisaputi.pdf
    • https://cdn.shopify.com/s/files/1/0455/3277/4565/files/online_shopping_advantages_and_disadvantages.pdf
    • https://cdn.shopify.com/s/files/1/0465/1941/9038/files/capitulo_3a_realidades_2_answers_pg_53.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb1e6880f2654da2884085ebdeb17af9.pdf
    • https://static.usrfiles.com/ugd/fe83c3_70e9b444909b4fc3b60cd112f1dc9205.pdf
    • https://static.usrfiles.com/ugd/6d59ab_a9ee08acafa241e4ac4245dd0ab7fde5.pdf
    • https://static.usrfiles.com/ugd/cfa91a_613d92dcf8b949fba574486c2f03c81f.pdf
    • https://cdn.shopify.com/s/files/1/0432/8030/2240/files/48368254070.pdf
    • https://cdn.shopify.com/s/files/1/0433/0360/0283/files/32605342573.pdf
    • https://cdn.shopify.com/s/files/1/0437/2371/8805/files/7398422767.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/iqhayiya_college_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3627/files/japajetunit.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_off000074e5.bin
f7dbed12e18eb3d15734eabace59f32606f38b0b244188139255200ca3021c0c
pdf-font-stream PDF embedded font (sfnt) at offset 0x74E5 5504 bytes
font_01_sfnt_off00008769.bin
0f6a567386e84aa477e7c6f94473f273e11bca663887a2bb0946c2983ff2e553
pdf-font-stream PDF embedded font (sfnt) at offset 0x8769 10704 bytes