Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb5b7798a8c8246a…

MALICIOUS

PDF

58.9 KB Created: 2020-08-30 11:59:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87ff5be00a3f7c70af8ee81f9e2e7bd8 SHA-1: 8c43f2aa0440fc86e5da49f22ab5271cc2ee3e2f SHA-256: eb5b7798a8c8246ab36c45fe4f780bf0691abe387e2b9309ae7b35091e8c46ab
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is 'https://ttraff.cc/wix?keyword=indice+de+sorensen'. The document body is heavily obfuscated but contains this URL, suggesting it's the intended lure. The presence of numerous links points towards a link farm or SEO manipulation tactic, often used to mask malicious redirects.

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.cc/wix?keyword=indice+de+sorensen
    • https://static.usrf
    • https://static.usrfiles.com/ugd/d94ae5_b45157ac79544b7381f91ebcdd2ea427.pdf
    • https://static.usrfiles.com/ugd/b8c837_d1d7f7b7a9fa4410bb39b8d6906269d2.pdf
    • https://static.usrfiles.com/ugd/05900a_498a3739ce0148678ba688751a68900e.pdf
    • https://static.usrfiles.com/ugd/de65f7_9491643474da4990a21c6e306641c00d.pdf
    • https://static.usrfiles.com/ugd/b8c837_3dae7c95d2ea480b9f0a0079271707eb.pdf
    • https://static.usrfiles.com/ugd/191a6d_54a4e9af45824f20a2d73041ac3e8c74.pdf
    • https://static.usrfiles.com/ugd/b8c837_e17f5444ee2445dbbd3d9962f5a52bed.pdf
    • https://static.usrfiles.com/ugd/b8c837_0265392217ca4d0c9113f8cf1b3a9dd3.pdf
    • https://cdn.shopify.com/s/files/1/0437/5085/0709/files/baten_kaitos_100_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/2757/0596/files/although_though_even_though_in_spite_of_despite.pdf
    • https://static.usrfiles.com/ugd/b8c837_517b4ec932634a7c88d540facb71d5c9.pdf
    • https://static.usrfiles.com/ugd/0ebc1f_db9d65d0a5fd42e380d4f76fa65e3e3a.pdf
    • https://static.usrfiles.com/ugd/9ec29b_72395422f4564e93a0b2fe96168cbdbf.pdf
    • https://static.usrfiles.com/ugd/b8c837_71c262587a934036acc0b4c0dc330a00.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000082c5.bin
d5724b2a77d373519b85eb14f7b872e86c1aa78cbd575f31e2238724671059b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82C5 4628 bytes
font_01_sfnt_off00009283.bin
843fff9c7f111854c2c51f1f297c75d19f6607342ff866f52dee6baadad045c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9283 17972 bytes
font_02_sfnt_off0000c863.bin
ae97ebdbf5cb6679ee3ae7f6f8963da9ec2437ada1f672a33085bc8cbe806833		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC863 16060 bytes

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