Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9ac40d77a7877d6…

MALICIOUS

PDF

42.2 KB Created: 2020-08-13 22:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bcbc93a88178b21c338e34662e51ec7 SHA-1: a9d2f42d8ff9ee1ac1d3da2e5a3b0865e2350dd7 SHA-256: e9ac40d77a7877d6cbe15aa6158677f26b72e443a399c4c657f13af04ced7330
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=amcrest+nvr+hard+drive+format'. This indicates the document is designed to redirect users to potentially harmful content. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute content broadly. The document body itself is heavily obfuscated and contains the malicious redirector URL, reinforcing the malicious intent.

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=amcrest+nvr+hard+drive+format
    • http://files.rochesterphoenixmartialarts.com/uploads/1/3/0/7/130740385/fexuwofigoba-sesijer.pdf
    • http://fogin.synergytherapiesofkc.com/uploads/1/3/1/4/131437508/3202355.pdf
    • http://files.curtainrepair.com/uploads/1/3/0/7/130738792/sixuwiwepe-talor-gixudadivada.pdf
    • http://files.valleywed.com/uploads/1/3/2/6/132682134/jugubuz_zoduwibireja_rojikulurerepax_mazida.pdf
    • http://vagon.chocolatelover.ph/uploads/1/3/1/3/131398455/latujumezidezom.pdf
    • https://cdn.shopify.com/s/files/1/0435/3998/8648/files/wapaneweta.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1149/files/saxojebuvadu.pdf
    • https://cdn.shopify.com/s/files/1/0436/5733/0853/files/13240989009.pdf
    • https://cdn.shopify.com/s/files/1/0436/9481/7445/files/jozinirogavetetofokupo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/55362451418.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/free_email_providers.pdf
    • https://cdn.shopify.com/s/files/1/0428/0372/4455/files/bikisumememederim.pdf
    • https://cdn.shopify.com/s/files/1/0432/7895/8758/files/17912846976.pdf
    • https://cdn.shopify.com/s/files/1/0432/6621/2003/files/fezurufuvufiji.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/47701113658.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_off000065e4.bin
95634778af3ac2643547ac6ac76b7d2d3b2d86dbdc39a3d880b39496f3510bb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65E4 5276 bytes
font_01_sfnt_off000077a0.bin
0c7d2b98a47c088a7defc3a854f5bac1c4e71f20666dbada46fcff0dea1a8277		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A0 10740 bytes

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