Malicious PDF — malware analysis report

Static analysis result for SHA-256 29612b1bb24c864e…

MALICIOUS

PDF

41.2 KB Created: 2020-08-22 19:37:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 792811fc989a03a0f08a7a53a75b4e0f SHA-1: 4399a8d182ea99131821fcb360b0173d45b4627f SHA-256: 29612b1bb24c864e682454073f74fd0534a29bf6af346cb3737346097ae02ecd
120 Risk Score

Malware Insights

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

The PDF file contains a link farm, with a primary malicious redirector URL disguised as a free font download. The document body, though heavily obfuscated, contains the same lure text and URLs. The heuristic firings indicate the PDF is designed to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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=barcode+font+excel+2010+free
    • http://files.adelaide-brushfencing.com.au/uploads/1/3/1/3/131378993/dalidozokabejetav.pdf
    • http://zazezida.toolbeltoflearning.com/uploads/1/3/0/7/130776031/megurewuzelozabuli.pdf
    • http://nejodev.shadecreekwatershed.org/uploads/1/3/2/7/132740480/zagumusebawupudake.pdf
    • https://cdn.shopify.com/s/files/1/0428/1883/0492/files/79541008169.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/caucasian_chalk_circle_play.pdf
    • https://cdn.shopify.com/s/files/1/0433/9158/2357/files/25596676357.pdf
    • https://cdn.shopify.com/s/files/1/0429/1035/1513/files/76516386954.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/sijekibutikarukesapav.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7296/files/64921187924.pdf
    • https://cdn.shopify.com/s/files/1/0432/3059/3192/files/employee_self_evaluation_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/2136/8472/files/waco_craigslist_org.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pagujusevidunevaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/9736/6436/files/manualidades_con_palitos_de_helado_paso_a_paso.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/jidotizowiridezafaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87664315042.pdf
    • https://cdn.shopify.com/s/files/1/0429/2168/9254/files/10373646803.pdf
    • https://cdn.shopify.com/s/files/1/0431/4952/5156/files/77156057376.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_off000063a9.bin
e13f47cf100bf9d0b55c6df0bb2694d008a28f025c3cd3bde06a81535e4c9241		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63A9 5280 bytes
font_01_sfnt_off000075b0.bin
2e7ba357fcc4a08244e89dc039046cf1f16f9602ea2946004e8f61fb4ed3a6e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75B0 9968 bytes

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