Malicious PDF — malware analysis report

Static analysis result for SHA-256 224f75c50502cfd7…

MALICIOUS

PDF

41.3 KB Created: 2020-09-11 17:38:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 869575dc3ccb9a8ae58aa878a59bf512 SHA-1: 0061d5849fd14862f1c0fc17dc5c21640764ded3 SHA-256: 224f75c50502cfd7a9860e4f64d9f2b6f8f76cb73d41eea611f154ea38865199
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, a technique often used in SEO poisoning or link farm attacks to manipulate search engine results or lure unsuspecting users. One of the embedded URLs, 'https://ttraff.link/wix?keyword=chroma+key+explosion', is flagged as a known malicious redirector. The document body is heavily obfuscated and contains some of the URLs, suggesting the primary purpose is to redirect the user 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=chroma+key+explosion
    • http://files.cookcreativemedia.com/uploads/1/3/1/0/131070611/b57101.pdf
    • http://zamolaj.gridironcamp.com/uploads/1/3/1/8/131856158/1b53a20e26e6.pdf
    • http://files.smokyridgecoffee.com/uploads/1/3/0/9/130969237/7221826.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc8001a335954c0597ff760a643b0b0d.pdf
    • https://static.usrfiles.com/ugd/12dc78_dff25731196848e888a7b416d5399f02.pdf
    • https://static.usrfiles.com/ugd/cc03df_a4bca8779302477e93a8613cd98ac25a.pdf
    • https://static.usrfiles.com/ugd/599f1c_9fcb7b605a244e8190bff728fdb3341d.pdf
    • https://cdn.shopify.com/s/files/1/0460/6561/5003/files/earned_income_credit_table_2017_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/1988/7001/files/uses_and_misuses_of_social_media.pdf
    • https://cdn.shopify.com/s/files/1/0430/3290/3833/files/tekomuzitibubenugosezu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8102/3132/files/55896929995.pdf
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/wedobijugado.pdf
    • https://cdn.shopify.com/s/files/1/0433/4940/9950/files/avg_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0437/1097/2056/files/19140994631.pdf
    • https://cdn.shopify.com/s/files/1/0432/0041/3856/files/lotemuwirejogezagim.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6353/files/diet_for_celiac_disease.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_off00006406.bin
b551898037fa514fa2d522fe4bc6aea9748b6d2e0bd3a3f501678cab8ad7d873		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6406 5196 bytes
font_01_sfnt_off00007586.bin
3d1d7a7a402b077f80bc9122f8f234a3ca3ece095de319ac05cc4d2d001240c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7586 10860 bytes

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