Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbbeefa40051470f…

MALICIOUS

PDF

45.7 KB Created: 2020-08-12 13:18:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 635100683f362d26880ef316b8062bdc SHA-1: e71a29253549ed4a32821a42b10d6707c9214c51 SHA-256: cbbeefa40051470fdba66ecab53d630c676daacbb4737fadd769d32f0f6caf27
122 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used to inflate search engine rankings or redirect users to malicious sites. One of the extracted URLs, 'https://ttraff.com/wb?keyword=the%20aleph%20', is flagged as a known malicious redirector. The PDF structure and the presence of numerous links, including to potentially malicious infrastructure, suggest a link farm attack pattern. No scripts were extracted, limiting the analysis of direct payload delivery.

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.com/wb?keyword=the%20aleph%20\(short%20story%20collection\)%20pdf
    • http://zewetewat.carisambasoccer.com/uploads/1/3/1/3/131381464/berog-zorawu-kazigevugaxovuz-jirofefas.pdf
    • http://files.johndecastro.com/uploads/1/3/2/6/132696598/kawewotunoredivuvitu.pdf
    • http://files.jvandoorne.com/uploads/1/3/2/7/132710721/fad70ead1ecc.pdf
    • https://cdn.shopify.com/s/files/1/0431/5398/1594/files/tilomabagarozifogu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/pedozozugowizetumejugokab.pdf
    • https://cdn.shopify.com/s/files/1/0431/9199/2481/files/pdf_to_editable_word_converter_ocr.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/logufelese.pdf
    • https://cdn.shopify.com/s/files/1/0432/0601/7185/files/37745155487.pdf
    • https://cdn.shopify.com/s/files/1/0432/4232/4125/files/90948526974.pdf
    • https://cdn.shopify.com/s/files/1/0437/3312/3221/files/61840449933.pdf
    • https://cdn.shopify.com/s/files/1/0432/1568/3744/files/fotujemisivom.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7296/files/regege.pdf
    • https://cdn.shopify.com/s/files/1/0438/3450/7426/files/pijoguxadupejarowatizumu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4120/1064/files/19992763719.pdf
    • https://cdn.shopify.com/s/files/1/0431/5879/8492/files/89350819311.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_off0000670a.bin
afbd875011950ea408f283c2894c391b7ed7365c9e8d0beea8b4d0f134acfe32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x670A 5448 bytes
font_01_sfnt_off0000799d.bin
b355d2b5d8ae907c1265e3518ebe6cad85baeaa7f46ef5a211ef298a8e71edfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x799D 16084 bytes

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