Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dd3476b42a2dcb7…

MALICIOUS

PDF

32.3 KB Created: 2020-08-31 06:15:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b0ca4385fd9ea398fe02e819f74d851 SHA-1: d7d87f1f52991bc791c10625c29be37e362c727e SHA-256: 4dd3476b42a2dcb7d9085ff701f1998f94c1a6138c9c6f5706533b8c6d12ba8a
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, pointing to 'https://ttraff.link/wix?keyword=cattel+and+crops'. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external links, with 'https://cdn.shopify.com/s/files/1/0437/9371/1261/files/gaxurimanufe.pdf' being the first identified. The document body, though heavily obfuscated, contains references to these URLs, suggesting an attempt to manipulate search engine results or direct users to malicious content.

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.link/wix?keyword=cattel+and+crops
    • https://cdn.shopify.com/s/files/1/0437/9371/1261/files/gaxurimanufe.pdf
    • https://cdn.shopify.com/s/files/1/0449/6277/5199/files/safety_kpi_excel_template.pdf
    • https://cdn.shopify.com/s/files/1/0449/3757/6603/files/epic_hyperspace_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/8272/5029/files/ielts_speaking_part_2_topics_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/wipusopanun.pdf
    • https://cdn.shopify.com/s/files/1/0427/8986/3580/files/reraxuwoma.pdf
    • https://cdn.shopify.com/s/files/1/0449/9243/0248/files/rodurijekubafedajuju.pdf
    • https://cdn.shopify.com/s/files/1/0438/0203/4336/files/49983323363.pdf
    • https://static.usrfiles.com/ugd/0b46e6_dd6b9297444c42a7bfe49e15325a3d31.pdf
    • https://static.usrfiles.com/ugd/9d66c7_81f2342481954a8da1904e00c31fb346.pdf
    • https://static.usrfiles.com/ugd/9b5f63_e0cf4c83eda24c5a82e4adef60bc9d83.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_off0000424a.bin
075f94cd3cd2cd23f798499e9b0e9744e3e35dad5066fa2cb15e1d3c4c7e3e29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x424A 4972 bytes
font_01_sfnt_off00005333.bin
587fd325b20199348592fdfc59b4f32eed272dc68633670b8dc98da8a04b54fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5333 9860 bytes

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