Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4f488d4f1c3f41d…

MALICIOUS

PDF

46.1 KB Created: 2020-09-06 00:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afc1a68ad92ca9f58d7077b334a579b9 SHA-1: 4cb96a24b60cf24cbd1ff9c5aa00f3e552e4d6f5 SHA-256: b4f488d4f1c3f41dd2eb92a68e8b1e81b08e16ece9962d4192b5425dbafd63b9
150 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The primary malicious URL identified is 'https://ttraff.club/wix?keyword=bootstrap+3+address+form+example', which is likely used to lure victims into a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to this URL and other benign-looking PDF links, suggesting a coordinated effort to obscure the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=bootstrap+3+address+form+example
    • https://static.usrfiles.com/ugd/575363_7e8676929d81415d8c752e1ff3ccd03b.pdf
    • https://static.usrfiles.com/ugd/0c41e7_c79f061362e14a04817ecfbe64ac5424.pdf
    • https://static.usrfiles.com/ugd/0779a3_59ad0e2718c245b2b587e852411f218e.pdf
    • https://static.usrfiles.com/ugd/b3bc21_f6221f43a87a46d3b498f0ea2edfa3fb.pdf
    • https://static.usrfiles.com/ugd/804ff6_d08ae41266db424c8b9459e48d6a34c0.pdf
    • https://static.usrfiles.com/ugd/f7fbc8_4eb6d753b1a243bd80e9d33a1336fe0d.pdf
    • https://static.usrfiles.com/ugd/5bb01c_c9ae501054a345fda2f0cdbda27b8652.pdf
    • https://static.usrfiles.com/ugd/564d2e_c9770929be364bf8a1f86c81a570296c.pdf
    • https://static.usrfiles.com/ugd/ce14f3_7805e872917a439d95de795551c4b019.pdf
    • https://static.usrfiles.com/ugd/585b1d_239dfa0688e8404f814a811db7ce31de.pdf
    • https://cdn.shopify.com/s/files/1/0434/3883/3816/files/49942144580.pdf
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/54620816225.pdf
    • https://cdn.shopify.com/s/files/1/0433/9400/7191/files/jibovefotelurusa.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_off00006517.bin
e54527a76e2779d2910cbc0bfaa69874a65f2772212e773d2fef40b892fecb5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6517 5468 bytes
font_01_sfnt_off000077a4.bin
2718b16419be8bba379444df999fb152c8e264c7a59fd51809b104ce56063f27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A4 16824 bytes

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