Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb3ff51b3ed481b1…

MALICIOUS

PDF

43.1 KB Created: 2020-09-17 17:38:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 471585b4e7cd8810a64fdc029405a2c3 SHA-1: 361df33f6ff1e5d341d297402f931cf958bf4961 SHA-256: eb3ff51b3ed481b12829f865c9e9110079b8ce20aedd59cb84b7e2744384c8e5
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 a critical heuristic firing indicating a link farm and a redirector. One of the primary links directs to 'https://ttraff.club/wix?keyword=wuthering+heights+setting+analysis', which is flagged as a malicious redirector. The document body itself is largely obfuscated but contains metadata suggesting it was generated by wkhtmltopdf, and includes the same suspicious URLs found in the heuristics. The overall pattern suggests an attempt to manipulate search engine results or redirect users 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.club/wix?keyword=wuthering+heights+setting+analysis
    • http://files.twohugos.com/uploads/1/3/0/7/130738993/3e447d2c1b5e91.pdf
    • http://files.lazioreview.com/uploads/1/3/2/6/132681062/5191c39.pdf
    • http://files.dreamgirlpublishing.com/uploads/1/3/1/4/131407278/8717820.pdf
    • http://files.tgmwindsteppers.com/uploads/1/3/1/6/131606046/madamaroverumix-wokatojub-lepugogivu.pdf
    • http://files.southjeffersonrescue.org/uploads/1/3/1/4/131438324/6925725.pdf
    • http://files.bewellinstitute.org/uploads/1/3/0/7/130740297/gavezawenaw-jumebo-wudemesup.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/febipak.pdf
    • https://cdn.shopify.com/s/files/1/0430/6619/6122/files/voxamikasagifevujuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/4171/0499/files/lugixuxolixatugaxisaguz.pdf
    • https://341f0071-18b3-42cf-96fb-52f8e0bd44ab.filesusr.com/ugd/6e13d9_9882b62bf556468e84a818492e04b636.pdf?index=true
    • https://9076f5a4-f354-40e1-a06a-b1267c227508.filesusr.com/ugd/964009_44a4792252264b2e8daa51551b115c86.pdf?index=true
    • https://d6d46862-e882-488b-a05c-528d3ff51330.filesusr.com/ugd/83f04e_bb1d8f13a0274061a24b00c5668c7342.pdf?index=true
    • https://1d87a6aa-320e-4c8c-bae8-d2d74b67a0c9.filesusr.com/ugd/ad2ade_c94a115e956c47f8b4929e99fd6c9b7d.pdf?index=true
    • 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_off00006b8a.bin
771e2f92a29be6d9754beca04cc45e46ce3f95bdbdac4963fe3480d7f3cf1f7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8A 5060 bytes
font_01_sfnt_off00007cd0.bin
8516264e84e0d23972c5ff3c268197182c2d21bd9989a4ce78c8b38bd0c41a6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD0 10312 bytes

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