Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b28b2fa1e1f587b…

MALICIOUS

PDF

88.9 KB Created: 2020-09-04 15:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: febe677f688e0f4d0c41972bf9d8b99b SHA-1: 238eab2cea03ce10b26944c5eb1cd863e941349f SHA-256: 1b28b2fa1e1f587bd28fa0af0998b54a03182c9d1d709ce07d80849c1affa81f
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.me/wix?keyword=ebook+akuntansi+internasional+pdf', is designed to lure users into clicking it under the guise of downloading an ebook. The file also contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or SEO manipulation tactic to distribute the malicious URL.

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=ebook+akuntansi+internasional+pdf
    • https://cdn.shopify.com/s/files/1/0434/2457/9736/files/1730830584.pdf
    • https://cdn.shopify.com/s/files/1/0432/0277/3156/files/gurogumome.pdf
    • https://cdn.shopify.com/s/files/1/0429/2752/1948/files/82818361476.pdf
    • https://cdn.shopify.com/s/files/1/0433/3253/4422/files/facebook_lite_for_samsung_java.pdf
    • https://cdn.shopify.com/s/files/1/0432/6300/0734/files/windows_root._system32_hal._dll.pdf
    • https://cdn.shopify.com/s/files/1/0436/7620/5209/files/wafanufidokusozovuwimi.pdf
    • https://cdn.shopify.com/s/files/1/0440/5228/3542/files/jiziwatevumifevawadejax.pdf
    • https://cdn.shopify.com/s/files/1/0429/8326/0314/files/shri_ganapati_atharvashirsha_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0462/6884/2146/files/evaluating_algebraic_expressions_worksheets_grade_6.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_off00012294.bin
5c019a2b32c5a1821ed77aa325e02198e5262fe8dc5e7c9f248c5d21532a212b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12294 5196 bytes
font_01_sfnt_off00013451.bin
f0eef5fe25f5b243f1837ba785469d44a08cb8c033790078ec7843c5818ba168		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13451 10228 bytes

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