Malicious PDF — malware analysis report

Static analysis result for SHA-256 daee5ec14eac9e98…

MALICIOUS

PDF

40.3 KB Created: 2020-07-10 15:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8127f1df4a23369a8da1ccb19f6d0390 SHA-1: 3ae6905ad5bd480f6f0bd4c98b1b8454107ea502 SHA-256: daee5ec14eac9e98bd09c7eb109c3f0f59d7e839a705c4f4fa9d717580fc9f0a
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or redirection strategy. One prominent link, 'https://ttraff.cc/wb?keyword=stool%20examination%20for%20parasites%20pdf', is flagged as a malicious redirector. The ClamAV detection 'Pdf.Dropper.Agent-9253424-0' further supports its malicious nature. The document body, though partially obfuscated, contains the same lure text and URLs, indicating an attempt to drive traffic to malicious infrastructure.

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.
  • ClamAV: Pdf.Dropper.Agent-9253424-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9253424-0
  • 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=stool%20examination%20for%20parasites%20pdf
    • http://files.coolummensshed.org/uploads/1/3/1/3/131384249/tozijelesajuwejaju.pdf
    • http://files.theflourishsisterhood.com/uploads/1/3/1/3/131398156/95d18288fa830.pdf
    • http://files.masonjarstudio.ca/uploads/1/3/0/8/130873807/nefepizibek.pdf
    • http://files.lomtheater.org/uploads/1/3/0/8/130813975/raviv.pdf
    • http://files.stagnesreym.com/uploads/1/3/1/6/131608037/2f62b7b723e.pdf
    • http://files.solarpowereducation.com/uploads/1/3/0/7/130739764/2650698.pdf
    • http://files.thefeltfactory.co.nz/uploads/1/3/0/7/130776841/xizixexa-dajawotubep-fekifomidele.pdf
    • https://zatugizatit.files.wordpress.com/2020/06/diguzu.pdf
    • https://pobodevoke.files.wordpress.com/2020/06/bigawasuzen.pdf
    • https://ganaleb691624115.files.wordpress.com/2020/07/zotusawomizekotegadokat.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/bipinirawasisiwonidomo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/fifisifibozufikesawo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28391359898.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93236297381.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78683638278.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vidabuvuwegorowomilamum.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12909571685.pdf
    • https://medlineplus.gov/lab-tests/ova-and-parasite-test/
    • 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_off00006174.bin
dbe5745f87038278a3e36bfbf347738325f1e55b594c47b0a81e25bcb1b76012
pdf-font-stream PDF embedded font (sfnt) at offset 0x6174 5144 bytes
font_01_sfnt_off000072d2.bin
061d4ae7044e14d8e4050d175395a9fe45f04d659526f5cbdd2dd30e023f4957
pdf-font-stream PDF embedded font (sfnt) at offset 0x72D2 9724 bytes