Malicious PDF — malware analysis report

Static analysis result for SHA-256 20fb05bbf521907b…

MALICIOUS

PDF

37.0 KB Created: 2020-08-31 06:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03d4da0fe39ca2e7be3b071f5262c6d5 SHA-1: ed0cecbe88ce8f2b85c5794e486387ff2c1e1e35 SHA-256: 20fb05bbf521907bb6ea229814e41dfbf2745720a4510b12b9cb59cf5eac27dc
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a driver download. The document body, though heavily obfuscated, contains the URL and keywords related to the lure. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the malicious nature of the embedded URL, and the PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, typical of SEO poisoning or link farm abuse.

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.com/wix?keyword=samsung+srp-+770ii+driver
    • https://static.usrfiles.com/ugd/b8c837_4e879196731f4fcd8f61cb0a8b758c74.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b50bcbcf018438aa93353c7cc087134.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e11ff3e91fc41cd85f632d0b3ccf2ae.pdf
    • https://static.usrfiles.com/ugd/ac51ce_8a8af9c76d324aa1a1f443125151776d.pdf
    • https://static.usrfiles.com/ugd/ceb2e8_212341d90beb4dc6a0f761ca2a42e6a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_d33253fdaf18415091ede50dcd5b0372.pdf
    • https://static.usrfiles.com/ugd/b7082a_642bfca5768c49f78d7e8dc86cf5081f.pdf
    • https://static.usrfiles.com/ugd/dc98cc_9bea4d5ea82b407e8b91406e06fd58ec.pdf
    • https://static.usrfiles.com/ugd/b27199_2f3b3c5856974ec5bb2f2291a0f863be.pdf
    • https://static.usrfiles.com/ugd/b8c837_e80f3863e9394ff49499568e03ae0785.pdf
    • https://static.usrfiles.com/ugd/5ed537_79673b7b664d41078feef396aeff8803.pdf
    • https://static.usrfiles.com/ugd/b8c837_31d95a695f884083bc1682679f5bd960.pdf
    • https://static.usrfiles.com/ugd/345929_3551696b98b8433285c9e2cdd78eedc7.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_off00004f61.bin
5b5a5d1e411f3137a767fb3744bae6fc6b7fca25d803bb0a9df80a186fe8c3bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F61 5664 bytes
font_01_sfnt_off0000629c.bin
f9f7ca7c50b989f853f1a19eb614e3ccdac30385ff9b1fe4e4d4b03d7041e602		 pdf-font-stream PDF embedded font (sfnt) at offset 0x629C 10992 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.