Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea3296dc81695975…

MALICIOUS

PDF

42.1 KB Created: 2020-08-31 08:51:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 915de86adfbfb1732891144530111021 SHA-1: 0c388da95c3ae48766a34fb22cd845df03344fea SHA-256: ea3296dc81695975509b53d7c592112d506284bdba2d2f2ec38c663569c1882d
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a link farm designed to distribute malicious content or engage in SEO poisoning. The primary malicious IOC is the redirector URL, which likely leads to further malicious activity.

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=fundamenta%25C3%25A7%25C3%25A3o+da+metaf%25C3%25ADsica+dos+cost
    • https://static.usrfiles.com/ugd/60933b_0a326054a15244a1911b7c16fa5223c2.pdf
    • https://static.usrfiles.com/ugd/26481d_5e3c92a1d78841e9a6c6f80f8588d6a1.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1fe89458b6846199cd81dd7432a4906.pdf
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/piritinakal.pdf
    • https://static.usrfiles.com/ugd/34e21e_1b1625b9b2364fe3a1435aa0f90651f1.pdf
    • https://static.usrfiles.com/ugd/289c5e_ac3937aff8a149b79d208a542e419713.pdf
    • https://static.usrfiles.com/ugd/b444d4_aa01192f733c435e8513ab47bec9758f.pdf
    • https://static.usrfiles.com/ugd/9757e7_45ff31aea33c4a31aaf2e1f7b5b3ab4a.pdf
    • https://static.usrfiles.com/ugd/44b221_ea420a2219a74491a67074da16ed02a6.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9217/files/bamomev.pdf
    • https://cdn.shopify.com/s/files/1/0449/3633/1419/files/ds2_soul_memory.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_off000064e2.bin
4c6a67d481f39214788adde68d65f059aa5e8c8e3322ab7873893ca7cd99b344		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E2 5548 bytes
font_01_sfnt_off000076e2.bin
561eba49a7a31b21bb30927a03334d2a81cb88fee899774d3fb78dc86236a344		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76E2 11380 bytes

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