Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2e7e5925f3936d3…

MALICIOUS

PDF

45.4 KB Created: 2020-08-08 01:32:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c83c32ea98868ac9433351450eb2dab1 SHA-1: e51056bdf7ae02e024a287fb361b67508255c60b SHA-256: b2e7e5925f3936d3cb25a05ce74ced9b48e339e960c66c2f3d8f7a6e6ec69610
128 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific redirector URL, indicating a lure to malicious content. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the redirection to known malicious infrastructure. The presence of a 'download' button lure further supports the social engineering aspect of this attack. The document body, though heavily obfuscated, contains the malicious URL.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=caries+detection+dyes+pdf
    • http://files.joelemireart.com/uploads/1/3/1/6/131607027/lurinedidirej-mikadaz.pdf
    • http://files.selahtechnology.com/uploads/1/3/1/1/131164556/40ad1465.pdf
    • http://vinevidad.poderpac.com/uploads/1/3/1/0/131070450/5356752.pdf
    • http://files.ewiechart.com/uploads/1/3/2/3/132302913/gomokiwu-dapewijutufose-jofumuvusu.pdf
    • http://files.helenjonesart.com/uploads/1/3/1/4/131438788/lisasitod.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/69843928273.pdf
    • https://cdn.shopify.com/s/files/1/0429/9125/5713/files/70604132029.pdf
    • https://cdn.shopify.com/s/files/1/0434/5305/5128/files/familia_cathartidae.pdf
    • https://cdn.shopify.com/s/files/1/0437/7165/8392/files/65417283396.pdf
    • https://cdn.shopify.com/s/files/1/0436/6827/5353/files/fujalur.pdf
    • https://cdn.shopify.com/s/files/1/0432/1493/0084/files/nicolas_boileau_art_potique.pdf
    • https://cdn.shopify.com/s/files/1/0432/3485/3021/files/furixusodugefex.pdf
    • https://cdn.shopify.com/s/files/1/0432/2961/0141/files/making_acrobat_default_reader_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0429/3863/0300/files/40838037661.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/25929320479.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_off000073e8.bin
eefa9f75d67ad6820d8bc83fecd7b341c6930f6b8eb2d369324c8d081a4e1b06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E8 5124 bytes
font_01_sfnt_off0000856a.bin
e37514e3a3c2db0bad154e2741d6dfbc65c8641a4e67166430f133075e5e1ca1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x856A 10436 bytes

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