Malicious PDF — malware analysis report

Static analysis result for SHA-256 40047f4b82225a36…

MALICIOUS

PDF

52.7 KB Created: 2020-07-08 19:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54b8dec95bd3d25c67b8035e909b4594 SHA-1: 30f13efbb319ec3ddebd117b9bb4195c78a2a201 SHA-256: 40047f4b82225a36db51005382643ee59d682c2f4421b7411a95c52997be98da
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to 'https://ttraff.com/wb?keyword=after%20school%20program%20schedule%20pdf'. Another critical heuristic, PDF_SEO_LINK_FARM, indicates a mass of external PDF links, including 'http://files.norcalsmartvestorpro.com/uploads/1/3/2/7/132710655/96f0fa3.pdf'. The document body, though heavily obfuscated, contains text related to 'after school program schedule pdf', suggesting a social engineering lure.

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/wb?keyword=after%20school%20program%20schedule%20pdf
    • http://files.norcalsmartvestorpro.com/uploads/1/3/2/7/132710655/96f0fa3.pdf
    • http://files.handmadebylouisa.com/uploads/1/3/0/7/130775827/25f7f89e987e0.pdf
    • http://files.epsteinbarrvirusnaturalhealth.com/uploads/1/3/0/7/130738821/5100723.pdf
    • http://files.hunterandersonrichmond.com/uploads/1/3/2/6/132683088/6f08def95a7b36.pdf
    • http://files.smartrecruitment.com/uploads/1/3/1/6/131606231/1025580.pdf
    • http://files.kaybethavery.com/uploads/1/3/1/4/131454272/dabilu.pdf
    • http://files.becomingsarh.com/uploads/1/3/0/7/130739567/3400932.pdf
    • http://files.williammonaguenativeart.com/uploads/1/3/0/7/130739747/vunidegote.pdf
    • http://files.cateringandcreations.net/uploads/1/3/0/8/130814513/9295549.pdf
    • http://files.mrckc.org/uploads/1/3/1/8/131856624/matamawov_gitabunijak_xuzed.pdf
    • http://files.jmn-i.com/uploads/1/3/0/8/130814642/badegumun-vafadivo.pdf
    • https://vinuvifu.files.wordpress.com/2020/06/xasexavojisifizo.pdf
    • https://vakaximez.files.wordpress.com/2020/06/kaxerobavumamimaveg.pdf
    • https://fijimisu.files.wordpress.com/2020/06/gided.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81667611697.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/telisupuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45366335679.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_off0000917b.bin
7643b7a6c35190755c2f9693db0986b39af65c55fc201d6f324a0f576885cd5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x917B 5288 bytes
font_01_sfnt_off0000a37d.bin
2b004a66658b06898234352d03e0b1f757b770b670fb3148cc36add75a75ff50		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA37D 10088 bytes

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