Malicious PDF — malware analysis report

Static analysis result for SHA-256 e86777fb13e50371…

MALICIOUS

PDF

40.1 KB Created: 2020-08-05 16:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c809db43c5fa1a6d9ff900312f43848 SHA-1: ecec6418e911d81562488655667462011841d114 SHA-256: e86777fb13e5037163db148587de482595a23383a1fa750a4be3666f193e43b6
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'free math worksheets' and includes the malicious URL, suggesting a lure to a malicious site. The presence of a link farm heuristic further indicates an attempt to distribute malicious content. No scripts were extracted, limiting the analysis of direct execution capabilities.

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.ru/wb?keyword=free%20math%20worksheets%20for%203rd%20grade%20multiplication
    • http://files.coronadonaples.com/uploads/1/3/1/4/131437402/8d6b02901d4f155.pdf
    • http://files.shipleyartstudio.org/uploads/1/3/0/8/130873738/pirodi-purirexepo-sotubifav-wavilolujufuna.pdf
    • http://files.theheids.net/uploads/1/3/0/7/130739971/6148588.pdf
    • http://kunapus.ras.saintleoresidencelife.com/uploads/1/3/1/4/131438216/9980825.pdf
    • https://cdn.shopify.com/s/files/1/0432/6332/8411/files/97261863201.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0945/files/24443178790.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ligumugazawebamupewav.pdf
    • https://cdn.shopify.com/s/files/1/0434/7835/2034/files/94356750095.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1713/files/99961326282.pdf
    • https://cdn.shopify.com/s/files/1/0435/4136/4890/files/curso_de_ingles_avanzado_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0438/0629/4176/files/elternbrgschaft_mietvertrag.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tokon.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/79728180659.pdf
    • https://cdn.shopify.com/s/files/1/0431/8206/3777/files/siwifoxenajuxi.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_off00005c2d.bin
e03f85314dc3a04f1383fe8b8cf91a75f50483547a67bdea253a299d6408ae09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C2D 5844 bytes
font_01_sfnt_off00006ffe.bin
314e276153aa52144a3a9c53bd59979e20bce3807eec6f26b2f10084470a1d5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFE 10288 bytes

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