Malicious PDF — malware analysis report

Static analysis result for SHA-256 b513b8680a802859…

MALICIOUS

PDF

48.9 KB Created: 2020-09-05 20:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a47eae4a585235487f641e24169a32d SHA-1: f9306e9103d3594c264d22db142495faf9ef29eb SHA-256: b513b8680a802859506e90336c7ce7f855ab4ac2417e0d69fbc60605a984409a
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains text related to '3ds emulator for android 2019' and a URL pointing to a redirector, suggesting a lure to a malicious site. The presence of a large number of external PDF links also indicates a link farm, likely for SEO poisoning or traffic generation.

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=3ds+emulator+for+android+2019
    • https://cdn.shopify.com/s/files/1/0471/0118/2102/files/saxetexisixaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5086/8646/files/12757797516.pdf
    • https://cdn.shopify.com/s/files/1/0463/2585/8459/files/vietnam_labour_law_2017.pdf
    • https://cdn.shopify.com/s/files/1/0432/5025/3979/files/2293688050.pdf
    • https://cdn.shopify.com/s/files/1/0434/5213/7622/files/history_of_bioterrorism.pdf
    • https://cdn.shopify.com/s/files/1/0438/6196/7013/files/78599448497.pdf
    • https://static.usrfiles.com/ugd/b8c837_a35b832cc50148b8aeebe5931d5bafee.pdf
    • https://static.usrfiles.com/ugd/95089d_c1d696b3ef684068804174db99b750e9.pdf
    • https://static.usrfiles.com/ugd/f459ea_1b4dc09dc02b42a794d89ea06ab7af94.pdf
    • https://static.usrfiles.com/ugd/b8c837_a357a50928244d5bb6def5c10414f7e1.pdf
    • https://static.usrfiles.com/ugd/04c368_a73eab78afcb48fdbf4e17f7df48ad4f.pdf
    • https://static.usrfiles.com/ugd/06497e_d3e52569fefd4810bef5bcf2f04a93aa.pdf
    • https://static.usrfiles.com/ugd/8716ab_4e5cdee383814ae2af25ddd67f21a499.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_d07fca23f01e43ea89f07f796f3b317c.pdf
    • https://static.usrfiles.com/ugd/cec570_4a389325ecf747e7a2cefc0d1de3359f.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_off00007fb7.bin
edb58915cc3e3cfee0f2e664928bdb08898ae42636d10b78b698a883f1b8e6c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB7 5604 bytes
font_01_sfnt_off000092a4.bin
50f83299ab51a8922ac6e93f2aa5eeb646fee1ede63729d1d222cff4a9b7c710		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92A4 10556 bytes

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