Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7eb91b0e252c962…

MALICIOUS

PDF

41.7 KB Created: 2020-08-31 18:29:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 716d36818cfa9297817a03f64b17c756 SHA-1: b8a6df53878034f146e80f0224ae27d2a2574732 SHA-256: a7eb91b0e252c9624fb238248f57f86da38330b0bc5aa451cf0226d1146139a7
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing for a PDF link redirector. The document body, though partially corrupted, contains text related to 'best app read books android' and a URL that appears to be a search result lure. This suggests the document is designed to trick users into clicking malicious links, likely for phishing or malware distribution.

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.club/pify?keyword=best+app+read+books+android
    • https://static.usrfiles.com/ugd/1c90dc_0c236780f1a147699cdaafc63b258654.pdf
    • https://static.usrfiles.com/ugd/b8c837_52c0aabd9ede4b29a95bcca3a3c3fed3.pdf
    • https://static.usrfiles.com/ugd/4bb894_925c8286dbfe44a9abb2b2c77264f5a7.pdf
    • https://static.usrfiles.com/ugd/5cf23b_4fa9782474b446bb9ff858f3bfe87a3f.pdf
    • https://cdn.shopify.com/s/files/1/0432/4114/4483/files/12764879247.pdf
    • https://static.usrfiles.com/ugd/b8c837_b72dee6326534a7fa73e2601425d7c25.pdf
    • https://static.usrfiles.com/ugd/fbccce_07506f5caa8f470dad4b989efeb69e20.pdf
    • https://static.usrfiles.com/ugd/ce14f3_1e79e71d4a7b4cd284f8b64a57c90bc8.pdf
    • https://static.usrfiles.com/ugd/4ae4db_a9cc72396768417682e07fd3ce69b850.pdf
    • https://static.usrfiles.com/ugd/b8c837_3818fe0eb3334579ad71dfd449b18d41.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_ecd40fe805544c11a9fd80de455d08e9.pdf
    • https://static.usrfiles.com/ugd/52b593_9ffab83ea4df44618ba297ae4bd5ec70.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_off000065ff.bin
b60bd03a6314aca9e8e328abbe2b97fe6918306f79500125dcb40c3508fa3f11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65FF 5172 bytes
font_01_sfnt_off000077a5.bin
b1039e7253965e7a04898315b8db7344d2b0cba93718c2d47654d4a7178580e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A5 10112 bytes

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