Malicious PDF — malware analysis report

Static analysis result for SHA-256 26799729a6fc0712…

MALICIOUS

PDF

43.7 KB Created: 2020-07-26 02:04:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 929605cd2af72d69a707575269c34804 SHA-1: 70cf7243993a806b5b1c2cd84d8998e146b2ab70 SHA-256: 26799729a6fc0712dc513acf67a53335b625eeb40d09ed34923af765f3016187
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.com, disguised as sheet music. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, indicating the document's primary purpose is to redirect users to malicious infrastructure. The PDF also contains a large number of external links, as flagged by PDF_SEO_LINK_FARM, suggesting a link farm or SEO poisoning tactic to distribute 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.com/pify?keyword=2+violins+and+viola+sheet+music
    • http://files.unitedchinchristianchurch.org/uploads/1/3/1/4/131483344/zolilu-kexaxagaju-gexawupoze.pdf
    • http://files.chicagoabortionfund.org/uploads/1/3/2/7/132740515/nugekeja.pdf
    • http://files.lumianna.fi/uploads/1/3/1/4/131437530/757f0f914f01.pdf
    • https://cdn.shopify.com/s/files/1/0434/6095/2229/files/38348965625.pdf
    • https://cdn.shopify.com/s/files/1/0435/1338/1028/files/mopufoseburenalakiwal.pdf
    • https://cdn.shopify.com/s/files/1/0432/1234/1416/files/nelaragivojiso.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2860038855.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1781/files/raxosexojiviku.pdf
    • https://cdn.shopify.com/s/files/1/0439/4418/1928/files/rujopus.pdf
    • https://cdn.shopify.com/s/files/1/0433/0304/3230/files/48869349736.pdf
    • https://cdn.shopify.com/s/files/1/0429/5956/9055/files/18395072478.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jonexosorovofevovu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5181/0969/files/sumotezaravagewasaduva.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16216600544.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_off00006e1b.bin
5f5948b30323d203f1688a71b051b17eaa46f879ace8f4e80ac43e7bbb9773f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1B 5060 bytes
font_01_sfnt_off00007f20.bin
35cf7b260abd63c8b947d50b9e03844d0b79de3a81e79c5b71eea586686c7226		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F20 10096 bytes

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