Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e5e07aad1ed7297…

MALICIOUS

PDF

46.7 KB Created: 2020-08-29 17:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c6672a400153325313a1373b156b7be SHA-1: 363c1d20fbd5d6c7ed11ec7e1bc6034cbbe749bf SHA-256: 9e5e07aad1ed7297ec32be6f1de391c649b8ff07dcc054c6cf3adc5f15e2adb7
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 heuristic specifically identifying it as a PDF link farm. The primary malicious URL, https://ttraff.ru/wix?keyword=blecaute+marcelo+rubens+paiva+pdf+do, is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other benign-looking URLs hosted on static.usrfiles.com, suggesting a tactic to disguise malicious intent within a large volume of links.

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=blecaute+marcelo+rubens+paiva+pdf+do
    • https://static.usrfiles.com/ugd/b8c837_b4a0729e245046edae04b76f9e289909.pdf
    • https://static.usrfiles.com/ugd/0049ca_9518df892db94306ac7145bb8caa6792.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_6581f99b1eec40bc8ed5792899eebfaf.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2d4489615cd4dc8bba1a7d44a224d1c.pdf
    • https://static.usrfiles.com/ugd/b8c837_43c840659fd2480593c52aa8e440cea8.pdf
    • https://static.usrfiles.com/ugd/b8c837_4d54ad11e8584cbdb733ad4d6aea8d5c.pdf
    • https://static.usrfiles.com/ugd/b8c837_404c24a989354ec29ef1d2ea9a374377.pdf
    • https://static.usrfiles.com/ugd/b8c837_9770a0d22a4e4a09a2eacce114899031.pdf
    • https://static.usrfiles.com/ugd/b8c837_6058219135d1484896c822688aac2bcc.pdf
    • https://static.usrfiles.com/ugd/067ecb_a9171463e25049d7a23e513ddedfd64c.pdf
    • https://cdn.shopify.com/s/files/1/0429/2991/4012/files/antrenmanlarla_matematik_4_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/0563/9836/files/vertebrate_zoology_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/0142/9662/files/xagubalojebuzatubi.pdf
    • https://cdn.shopify.com/s/files/1/0429/0071/7727/files/vevoxaribuxenirag.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006026.bin
5da39a376c714ff7c4d729bcd46294907fa0d7ce6498bcf3c31bcc793c1a0c72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6026 5548 bytes
font_01_sfnt_off000072ea.bin
ff7f2cf22e28d873a090e28df564d266c23a5d50d0bca7ea28d9cbf8a4612310		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72EA 10060 bytes
font_02_sfnt_off00009598.bin
de64acc18ffbc611b034033f56db5fe2fb073dba61ca9f96cc17f636cae7b9d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9598 16968 bytes

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