Malicious PDF — malware analysis report

Static analysis result for SHA-256 a547f25d90f2584f…

MALICIOUS

PDF

47.0 KB Created: 2020-09-06 18:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b033eab2790bbf030513b6ac2545a1f SHA-1: 68db9a89e147ba18e11cacbff0ac396f57c26520 SHA-256: a547f25d90f2584fc27459a45cb652ae7c5fba92e7384fa5873cc2780291d09d
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, identified as a 'PDF SEO Link Farm'. One of these links, 'https://ttraff.club/wix?keyword=biomorphic+forms+definition', is flagged as a malicious redirector. This suggests the document's primary purpose is to lure users to malicious sites, likely for phishing or to download further malware. No scripts were extracted from this sample.

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.club/wix?keyword=biomorphic+forms+definition
    • https://static.usrfiles.com/ugd/4542d9_fdb6022b59f145929f58b90203ed2e71.pdf
    • https://static.usrfiles.com/ugd/760a88_4670398bdaff4389be20f4aaa50d1904.pdf
    • https://static.usrfiles.com/ugd/2813e2_2a5d41b552284801a6091ac1524bfc36.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d8d8e51abbd4a3788e7fde0195f5ae2.pdf
    • https://static.usrfiles.com/ugd/136d07_697cf01b75c84d828d0d9b71b2a28312.pdf
    • https://cdn.shopify.com/s/files/1/0431/8104/7957/files/57301832148.pdf
    • https://cdn.shopify.com/s/files/1/0432/4956/5853/files/27157081478.pdf
    • https://static.usrfiles.com/ugd/b8c837_7179e4a896db4a4b8894c3dffc7416ca.pdf
    • https://static.usrfiles.com/ugd/3649d2_688dc3f6d2af47c4b071cf586ec0a083.pdf
    • https://cdn.shopify.com/s/files/1/0433/6048/5541/files/fomewes.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/2275697255.pdf
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/sanitary_test_for_coliform.pdf
    • https://cdn.shopify.com/s/files/1/0432/2754/5757/files/gimulidomaw.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_off00007a91.bin
5db91544a117aec1c0159dba95c0610162c100fcfb9c665fa854e56111582ed7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A91 5204 bytes
font_01_sfnt_off00008c1f.bin
a885011a3d3e77f707fb9bc7a18e47505af6ecf113b91d63d2f4bac28ecd6c91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C1F 10368 bytes

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