Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3c81b1618a2f47f…

MALICIOUS

PDF

39.8 KB Created: 2020-08-30 19:27:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87cef6f051fc033f0345c30c2fb09d75 SHA-1: 139431751a61b97939c038609dae3fe9e1718fed SHA-256: b3c81b1618a2f47fd3675e7133a4255884c9b7413b29e168fa794638c7632fdc
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one pointing to a known malicious redirector. The document body is heavily obfuscated but contains the malicious URL and numerous other links hosted on Shopify. This suggests a link-farming or redirection attack designed to lead 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.me/wix?keyword=mapas+cognitivos+tipos
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/sonodamaneliterepiza.pdf
    • https://cdn.shopify.com/s/files/1/0436/1954/9348/files/dagekarov.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7287/files/cours_sur_les_bascules.pdf
    • https://cdn.shopify.com/s/files/1/0434/8497/1173/files/govunibi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3756/4823/files/77784625616.pdf
    • https://cdn.shopify.com/s/files/1/0428/5091/0364/files/27893955680.pdf
    • https://cdn.shopify.com/s/files/1/0433/5792/9621/files/limawolalugiwil.pdf
    • https://cdn.shopify.com/s/files/1/0438/5390/6080/files/91745718548.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/12573355366.pdf
    • https://cdn.shopify.com/s/files/1/0429/0940/1254/files/chat_app_for_ios_and_android.pdf
    • https://cdn.shopify.com/s/files/1/0435/4729/5898/files/dosowo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5693/8646/files/callan_method_teacher_book.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_off00005ce1.bin
677c29644cfd21a245543f8fb3296b24d6005d85dacc59c87c5739c0a948af88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE1 5040 bytes
font_01_sfnt_off00006e21.bin
76d6e260ce7426f608ba2786991ab062915ab02a7a9db7d23296bd5eececa887		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E21 10808 bytes

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