Malicious PDF — malware analysis report

Static analysis result for SHA-256 33cceb13f7cef673…

MALICIOUS

PDF

32.2 KB Created: 2020-08-06 21:12:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b0c6d8519180307d7b94200cb2bf94b SHA-1: aae1a52593f7f696238886d90c590c46d1aa60d6 SHA-256: 33cceb13f7cef673929e11ebe3263783991c6918fd89f8248e0d6f6d896cac78
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=blouse+cutting+and+stitching+pdf+in+tamil', leads to malicious infrastructure. The document also exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains, likely for SEO manipulation to increase visibility. 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.cc/pify?keyword=blouse+cutting+and+stitching+pdf+in+tamil
    • http://tonewuze.blessingofheaven.org/uploads/1/3/1/6/131607131/d1a19df29ccd1.pdf
    • http://files.actioneducation.co.nz/uploads/1/3/1/1/131164075/01ed9b60299a.pdf
    • http://files.naturaltouchhealing.com/uploads/1/3/1/1/131164202/tuvotekejij-tewirage-lifafavi.pdf
    • https://cdn.shopify.com/s/files/1/0440/8272/5029/files/febuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/58085676994.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/59849623617.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/vemex.pdf
    • https://cdn.shopify.com/s/files/1/0435/5814/2120/files/91947700360.pdf
    • https://cdn.shopify.com/s/files/1/0430/8857/6673/files/calculus_early_transcendentals.pdf
    • https://cdn.shopify.com/s/files/1/0434/7589/4422/files/jowakufopejinugepeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/2282/7165/files/33402387984.pdf
    • https://cdn.shopify.com/s/files/1/0453/2862/9915/files/quality_assurance_pharmaceutical_industry.pdf
    • https://cdn.shopify.com/s/files/1/0434/1458/5509/files/gojegelojozal.pdf
    • https://cdn.shopify.com/s/files/1/0438/4099/5490/files/supifisive.pdf
    • https://cdn.shopify.com/s/files/1/0429/0789/3919/files/biceps_strain.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_off000042e9.bin
f53806289c7c285a2e0e3dcd974fbca15ee3ae43b0f3be8b83ff0c4ed6e30fa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42E9 5524 bytes
font_01_sfnt_off00005595.bin
ce9a91c68707b9fa5f87d3172f8ede0eba626ab0e7e66e10dd9b5127bab45f78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5595 8952 bytes

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