Malicious PDF — malware analysis report

Static analysis result for SHA-256 79a05cd36cc09868…

MALICIOUS

PDF

47.9 KB Created: 2020-08-31 00:22:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6681f1360a07c36e0d21cb167003ce56 SHA-1: 405399168370eff31d174f8ba35fde4560681b5d SHA-256: 79a05cd36cc09868eb4374edd3347f018d727a3a9138a1f2ca60fcea21e6ef42
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a critical redirector link to ttraff.com, which is flagged as malicious. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the document is designed to trick users into visiting a malicious site, likely for further exploitation or credential harvesting.

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=fundamentals+of+machine+learning+for+predictive+data+analytics+algorithms+worked+examples+and+case
    • https://static.usrfiles.com/ugd/3cb679_1cc4094133224caaa65c9366ad8cb2b2.pdf
    • https://static.usrfiles.com/ugd/cf14a4_9160c6a57a7e4aa39b8a5b4a185d7080.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_37e4933e5ecd40b98c5f055ab9695ca0.pdf
    • https://static.usrfiles.com/ugd/e5a943_e4b42509ee5142b7ac94b756820ed391.pdf
    • https://static.usrfiles.com/ugd/455f95_80032cea08a44c26bbf1b7fdee38d176.pdf
    • https://cdn.shopify.com/s/files/1/0431/2724/2914/files/prime_time_math_book_6th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8037/files/59726414933.pdf
    • https://cdn.shopify.com/s/files/1/0438/4561/5766/files/annual_leave_request_template_nz.pdf
    • https://cdn.shopify.com/s/files/1/0432/7161/8723/files/41210423534.pdf
    • https://cdn.shopify.com/s/files/1/0466/5252/2661/files/nutrition_information_la_madeleine_tomato_basil_soup.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_off00007983.bin
416142b5e2cd08e661d30622cfb8dd08a3dd72365aaf871e92bdda3afe8d8a65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7983 5912 bytes
font_01_sfnt_off00008d95.bin
1c527b0742243d369b7758597c2389fe6ae1cc1c45512d446464596dea9dc103		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D95 10664 bytes

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