Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dc565f0df718275…

MALICIOUS

PDF

35.8 KB Created: 2020-08-30 10:51:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85db055c5b95b538bc43033639b536e5 SHA-1: c1709e411e2fef1cbfc9a17a80c8d2e2409a9afe SHA-256: 1dc565f0df718275fc3d0a9477b3bd7df5440607ebcc88a975e97515cc25909f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link

The PDF file contains a significant number of embedded URLs, with one identified as a malicious redirector. This suggests the document is designed to lure users into clicking malicious links, likely for phishing or malware distribution. The presence of a link farm further supports this, indicating an attempt to obscure the true destination or distribute content widely. No scripts were extracted, and the document body is heavily obfuscated.

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.com/wix?keyword=ejercicios+de+numeros+del+1+al+30+pa
    • https://static.usrfiles.com/ugd/b8c837_c6fb2b26b98544619f5113cfd711a39f.pdf
    • https://static.usrfiles.com/ugd/b8c837_54b9d9deb186495c844334894d34d319.pdf
    • https://static.usrfiles.com/ugd/b8c837_03b79bbc41cb40b0a2e6c983721a8b59.pdf
    • https://cdn.shopify.com/s/files/1/0446/0825/8211/files/93248729064.pdf
    • https://cdn.shopify.com/s/files/1/0434/8759/2608/files/wondershareelement_ocr_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/9560/3880/files/wilms_tumor_treatment.pdf
    • https://static.usrfiles.com/ugd/18f527_c766b3b315654e7ead5b2cfdc544ca38.pdf
    • https://static.usrfiles.com/ugd/aef5b7_0248e89b1c9e42a187ff8ac0ca6ba232.pdf
    • https://static.usrfiles.com/ugd/8b49c6_e725e7179f3c4bf68fd4e76df61f943b.pdf
    • https://static.usrfiles.com/ugd/253000_94e04ca6936746498b88bba6e63e4f93.pdf
    • https://static.usrfiles.com/ugd/b8c837_91b65c4aed5c49e0b53f8eb71402cae4.pdf
    • https://static.usrfiles.com/ugd/0df15e_d3ca61b334094c38bbb265940f3637ad.pdf
    • https://static.usrfiles.com/ugd/db1da1_94d3951d48234f668a0b6266fc7bef5f.pdf
    • https://static.usrfiles.com/ugd/b8c837_e20c63f2fa844a8293d529830eaeef1e.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_off00004bbc.bin
7e20409920135aaab9376fe373a31776b29c29a9bf4c2c37481f41e86501acf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BBC 5612 bytes
font_01_sfnt_off00005eba.bin
e5c4ce94923402b60a6c719d7840b4f1e8f5143709e8fa151f51f03c574d8db2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EBA 10400 bytes

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