Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c11f52e262c17d4…

MALICIOUS

PDF

39.4 KB Created: 2020-08-14 23:26:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ba35311774e570c154d3c8663b175ba SHA-1: 5a1d0afc5034293bd26bbf38d0a0889a23ec7c3d SHA-256: 8c11f52e262c17d4dbd4678dd905fb2089a1962e9318469a45b71ed69873aa51
120 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 resources, a common tactic for SEO link farms. One of these links, https://ttraff.cc/wb?keyword=present%20perfect%20vs%20past%20simple%20lesson%20pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. 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.cc/wb?keyword=present%20perfect%20vs%20past%20simple%20lesson%20pdf
    • http://files.rainwaterfarmsny.com/uploads/1/3/1/4/131407647/7505118.pdf
    • http://kefes.mrscallsfifthgradeheroes.com/uploads/1/3/1/3/131383309/fesosiz.pdf
    • http://files.jerryott.com/uploads/1/3/0/9/130969699/addb9bdd98a7c4b.pdf
    • http://files.trulybodywork.com/uploads/1/3/0/7/130740142/9f2d4147.pdf
    • https://cdn.shopify.com/s/files/1/0437/0841/6165/files/86331515369.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/32527754718.pdf
    • https://cdn.shopify.com/s/files/1/0434/8719/9394/files/milig.pdf
    • https://cdn.shopify.com/s/files/1/0432/3419/7666/files/18579585615.pdf
    • https://cdn.shopify.com/s/files/1/0431/8212/9320/files/fallout_4_immersion_mods.pdf
    • https://cdn.shopify.com/s/files/1/0429/6271/4780/files/bachelard_biografia.pdf
    • https://cdn.shopify.com/s/files/1/0435/6286/0699/files/html_color_code_transparent.pdf
    • https://cdn.shopify.com/s/files/1/0429/5501/4298/files/caballo_de_troya_7_completo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9602/9864/files/xilunuvojikalizenim.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_off00005bf1.bin
1ca3e6487f4b22f8926ac687a4de8e228a2b171c05a13ed40905d4ffabd502e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF1 5364 bytes
font_01_sfnt_off00006e12.bin
f3475fab09426148ac52f862d2759d503275fc1972cc5c2a9cbdc725328ecdf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E12 10268 bytes

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