Malicious PDF — malware analysis report

Static analysis result for SHA-256 9439463e01700790…

MALICIOUS

PDF

45.5 KB Created: 2020-08-31 00:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46b671cba03b486af0f78611f80cc1dd SHA-1: f38dbf61341edf2df4bb386c7a01ff0f909b6d03 SHA-256: 9439463e01700790d41463f7a3956b2039cb6b9cd10c5752e0f70c3884b5732f
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, a technique often used in SEO poisoning or link farm attacks to manipulate search engine rankings or distribute malicious content. One of the embedded URLs, 'https://ttraff.club/wix?keyword=dawn+of+crafting', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, reinforcing its role in the attack. The presence of numerous benign-looking PDF links from 'static.usrfiles.com' alongside the malicious redirector suggests a deceptive tactic to mask the malicious intent.

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=dawn+of+crafting
    • https://static.usrfiles.com/ugd/6f7357_3fb4c35326eb4265b74d30ae7603cd56.pdf
    • https://static.usrfiles.com/ugd/4479ed_1bedc258e1c7432e8767435dfed75e70.pdf
    • https://static.usrfiles.com/ugd/b8bbd7_aed3333184a64ee790218245f0a52010.pdf
    • https://static.usrfiles.com/ugd/b8c837_e73519f9ed3340439bb3c4590368a882.pdf
    • https://static.usrfiles.com/ugd/b8c837_1cd0c15b13944d3c8c0a7ccd19bb429c.pdf
    • https://static.usrfiles.com/ugd/23e9be_77f7d746121947709e41500bec0b01e2.pdf
    • https://static.usrfiles.com/ugd/5bb01c_9c664846f2034dff9c4dc5fdd988c912.pdf
    • https://static.usrfiles.com/ugd/23e9be_9c076d95dfee41ee96653ce3841b9acd.pdf
    • https://static.usrfiles.com/ugd/fd7405_2b850fb8e3af42bd95d015ff5a44ede2.pdf
    • https://static.usrfiles.com/ugd/ce0e6d_5c843782bfd245c8b2d2e408b22976d9.pdf
    • https://static.usrfiles.com/ugd/77d535_e3f2893f56224f5ab03c0e4053b2c57c.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_off00006b25.bin
5681a33c7e773e7c45ec07057940aac5f738558a8c56afb89ff1f0e4a5204b3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B25 4932 bytes
font_01_sfnt_off00007c15.bin
3001cab6c1c99dc424f1c28767db382b5ed0b015a2d970bffd42bff1e8131814		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C15 14768 bytes

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