Malicious PDF — malware analysis report

Static analysis result for SHA-256 592272ea4a3bdd80…

MALICIOUS

PDF

38.9 KB Created: 2020-08-04 19:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e315538a7c00f1bd34578e3140b49e5 SHA-1: e8b08e4a2cf6afbf04d92c415db62be56fd6be3d SHA-256: 592272ea4a3bdd800fb0309d36d67acccab8b75451638c3b582df9cf069beda1
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at 'ttraff.cc'. The document body text, though garbled, includes the term 'Candesartan', likely a lure to encourage clicks on the malicious redirector. The primary attack pattern involves tricking the user into visiting a malicious URL, which then likely leads to further compromise.

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/wb?keyword=candesartan%20adalah%20pdf
    • http://dabuw.cofchristforesthills.org/uploads/1/3/1/4/131437402/7801031a.pdf
    • http://files.inletmanagement.co.uk/uploads/1/3/2/6/132695384/991068be93.pdf
    • http://files.matthieuferey.com/uploads/1/3/0/7/130775200/1370881.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nisej.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kofuka.pdf
    • https://cdn.shopify.com/s/files/1/0433/2778/3080/files/guvubumibel.pdf
    • https://cdn.shopify.com/s/files/1/0430/0357/6481/files/96646655140.pdf
    • https://cdn.shopify.com/s/files/1/0432/0346/1283/files/xadunoxan.pdf
    • https://cdn.shopify.com/s/files/1/0433/8604/4570/files/tutudafumuxirotubed.pdf
    • https://cdn.shopify.com/s/files/1/0432/4527/3251/files/46802955902.pdf
    • https://cdn.shopify.com/s/files/1/0435/7927/7467/files/14187723027.pdf
    • https://cdn.shopify.com/s/files/1/0439/1901/6104/files/libonemetosepiwewuvabin.pdf
    • https://cdn.shopify.com/s/files/1/0437/3289/3857/files/electrical_house_wiring_estimate.pdf
    • https://cdn.shopify.com/s/files/1/0429/2503/1590/files/warzone_damocles_mont_ka.pdf
    • https://cdn.shopify.com/s/files/1/0434/5446/4165/files/gesonepawixexisedux.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_off00005b06.bin
10a929286d16832d79bc8fdc4e5a4a0f85e5677cfbc9d75e3a48c3a881f07822		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B06 5032 bytes
font_01_sfnt_off00006c17.bin
2cc10ec358aa845e2ff781ec9385e85772acc228ec3701327dfdeac1e9ce0c86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C17 10236 bytes

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