Malicious PDF — malware analysis report

Static analysis result for SHA-256 97591014dad7053c…

MALICIOUS

PDF

62.6 KB Created: 2020-09-01 15:24:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b102f22aead8f50fcb86e90d4aa1a472 SHA-1: c72102d924a148e2b564360c236f20d3838cd247 SHA-256: 97591014dad7053c9414e16dade3da7cd12e6e43b3030c51a6bfc25bee26f532
150 Risk Score

Malware Insights

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

The PDF was flagged as a malicious redirector and a link farm, indicating its primary purpose is to lure users to external sites. The embedded URL `https://ttraff.com/wix?keyword=upper+klamath+river+salmon+fishing+report` is a key indicator of this malicious redirection. The ML classifier also strongly supports the malicious nature of this PDF.

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=upper+klamath+river+salmon+fishing+report
    • https://static.usrfiles.com/ugd/8cbfce_014ac25b30a144d4ae8868479fe961d8.pdf
    • https://static.usrfiles.com/ugd/96768c_a240788aeb7d4da5bb58e51fe4e4c77f.pdf
    • https://static.usrfiles.com/ugd/41f880_0ae22b8f1bed42b0b4662bb5d334c4a5.pdf
    • https://cdn.shopify.com/s/files/1/0431/6594/1917/files/solid_principles_c_book.pdf
    • https://cdn.shopify.com/s/files/1/0436/1961/4884/files/magnetic_properties_of_nanomaterials.pdf
    • https://cdn.shopify.com/s/files/1/0435/5561/8977/files/broadsheet_hobart_coffee.pdf
    • https://cdn.shopify.com/s/files/1/0435/5840/4245/files/kugusukipamawan.pdf
    • https://cdn.shopify.com/s/files/1/0429/5920/8604/files/american_business_merit_badge_pamphlet.pdf
    • https://cdn.shopify.com/s/files/1/0448/2914/7293/files/bible_download_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tijubijevuvikupox.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/21857966236.pdf
    • https://cdn.shopify.com/s/files/1/0432/1083/4077/files/import_script_to_tampermonkey.pdf
    • https://cdn.shopify.com/s/files/1/0432/1034/2559/files/wufezonolukitabati.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_off0000b3ef.bin
52b879ffe4780a9916f255327b4ca3c3443842a81ae631289c1e52dbc544b68a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3EF 5428 bytes
font_01_sfnt_off0000c64e.bin
be580531deadc70e1e41cc8d05ef36a47bca1187720dd36976e19e622d511d42		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC64E 11436 bytes

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