Malicious PDF — malware analysis report

Static analysis result for SHA-256 df2247a53522097d…

MALICIOUS

PDF

45.8 KB Created: 2020-08-31 02:21:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72dde64af5141938cbb595c96d167fe8 SHA-1: a7aaebad0929c0f87c9d95f5994b696b9fbf9c63 SHA-256: df2247a53522097d04520791bdcc8a0818593bb9a3ca86741f2c5d8880c1f1bb
120 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying a link to a known malicious redirector infrastructure at 'https://ttraff.ru/wix?keyword=sample+phd+research+proposal+chemica'. Another heuristic indicates a PDF link farm, suggesting an attempt to distribute content or traffic. The document body, though heavily obfuscated, contains text related to a 'sample phd research proposal', aligning with the lure observed in the malicious URL.

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=sample+phd+research+proposal+chemica
    • https://cdn.shopify.com/s/files/1/0433/8909/1989/files/81751148295.pdf
    • https://cdn.shopify.com/s/files/1/0438/2497/1936/files/luzokuxilogakedikavoluvep.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7570/files/vakitofiwibovurizuzi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4782/1212/files/nulanasidumiparaza.pdf
    • https://static.usrfiles.com/ugd/c4ccc4_72c83ff767fb452984429d2c88f07e6c.pdf
    • https://static.usrfiles.com/ugd/05900a_16f7b5a5b2d3463fa3f1b45e2c949552.pdf
    • https://static.usrfiles.com/ugd/93c935_528e979cb51f461db5b00b009b8373f4.pdf
    • https://static.usrfiles.com/ugd/6f58fb_b438be59ab5b48caab986855ab8120b3.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6ed77a08ea746e39774dbfc7ea47fd7.pdf
    • https://cdn.shopify.com/s/files/1/0435/5738/8440/files/numakabekuvufo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4951/7205/files/90570103405.pdf
    • https://cdn.shopify.com/s/files/1/0434/3654/0056/files/clayton_county_sheriff_police_reports.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5197/files/solucionario_matematicas_5_primaria_santillana_proyecto_saber_hacer.pdf
    • https://cdn.shopify.com/s/files/1/0437/4803/2663/files/11130433298.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_off00007453.bin
d803cccca2c90f6f31e996dc2e544fc27094d2eeecb5d388a078d9f91bd088e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7453 5416 bytes
font_01_sfnt_off0000868f.bin
a14ea048fc60c6fd173ebf4494db06eda469b508b65d7664d232d95734b382d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x868F 10816 bytes

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