Malicious PDF — malware analysis report

Static analysis result for SHA-256 455195d839ff0b60…

MALICIOUS

PDF

43.3 KB Created: 2020-08-29 13:31:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b4674710061b39ef090c24d6ea59f1a SHA-1: 8ff3b3a49dbd498d6b6356556983b20f4474735a SHA-256: 455195d839ff0b605a680ea963a681c520388e871bbcbb034c219acf5e4f6613
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, many of which point to a link farm hosted on static.usrfiles.com and a redirector at traff.link. This indicates a likely attempt to manipulate search engine results or direct users to malicious content. The presence of a redirector link and the sheer volume of links suggest a spam or phishing campaign. No scripts were extracted from this sample.

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.link/wix?keyword=kree%2527+arra+osrs+guide
    • https://cdn.shopify.com/s/files/1/0433/4521/5637/files/zabubimosozimewoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4484/files/39336815964.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3464/files/zumdahl_chemistry_7th_edition_solutions_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/669297692.pdf
    • https://cdn.shopify.com/s/files/1/0439/1239/6968/files/activesheet._exportasfixedformat_excel_vba.pdf
    • https://static.usrfiles.com/ugd/b8c837_0afa4b2a84a64e9baa824f45f18a3dfa.pdf
    • https://static.usrfiles.com/ugd/b8c837_e63ed30d3bb74fc4b721a7fc51224914.pdf
    • https://static.usrfiles.com/ugd/b8c837_3cae11349c0f48c1aa905d019fc1a3b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3a54f9e10504ccda4b2910aa5eba357.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4a1883c5e7a42648fcf9bd8cf3c0d4a.pdf
    • https://static.usrfiles.com/ugd/b8c837_a46eff4f4c9148cd9e90323c324d37a0.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b98516d006644e99a7af1b6f2eec0b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_c69011b469df45fc8f67f5be9037acaf.pdf
    • https://static.usrfiles.com/ugd/b8c837_4efc041662804cd8850484ddba4488ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_9205e142f72a4937a5e236e07320cc8b.pdf
    • https://cdn.shopify.com/s/files/1/0437/6802/1141/files/nathaniel_bassey_music_onise_iyanu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5611/files/31595878002.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_off00006b12.bin
6383dc4a30eb7f8dce56d01a582750e855cded454f01a6d44c423917a04d3a4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B12 4964 bytes
font_01_sfnt_off00007c0f.bin
66d5af59eee6a57065b2be5566baa12bf369d2bfbed0894fe9233e97ae7acfdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C0F 10780 bytes

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