Malicious PDF — malware analysis report

Static analysis result for SHA-256 292dfda71367a4fe…

MALICIOUS

PDF

36.5 KB Created: 2020-08-29 15:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8dae91e0305e4b75158d72d8426c6265 SHA-1: 9b351c7008ba37a06c4540586c92bb46bc4164e0 SHA-256: 292dfda71367a4fef539f470f40f4a4ee259f7156b66a96bc02c59cd81442022
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, many of which point to a link farm hosted on static.usrfiles.com. One prominent link directs to ttraff.com, identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Mandalas coloring pages' and the wkhtmltopdf tool, suggesting a lure to disguise the malicious intent of the embedded links.

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=mandalas+coloring+pages
    • https://static.usrfiles.com/ugd/b8c837_676f1336fc424038801eb58346dfde07.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3a080b41d5e40d0879a4276ef87e7a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_3a157940a3f544febec2083513d0072b.pdf
    • https://static.usrfiles.com/ugd/b8c837_338562cc6b86425db6658ce52b9d5520.pdf
    • https://static.usrfiles.com/ugd/b8c837_50c2136ffa7a4ac988b5cd84905a140d.pdf
    • https://static.usrfiles.com/ugd/b8c837_0fd34406ab50430ea2086a9692783284.pdf
    • https://static.usrfiles.com/ugd/b8c837_e1101caecdcf4652871983865634502c.pdf
    • https://static.usrfiles.com/ugd/b8c837_0425bbb4481e48e0a3c28e4ead617b81.pdf
    • https://cdn.shopify.com/s/files/1/0432/8197/3403/files/raspberry_pi_a2dp.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/24049325540.pdf
    • https://cdn.shopify.com/s/files/1/0447/1380/3932/files/sony_bravia_oled_4k_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/5128/4642/files/fernando_pessoa_tabacaria.pdf
    • https://cdn.shopify.com/s/files/1/0466/7529/6421/files/diabetes_guideline_canada_2019.pdf
    • https://static.usrfiles.com/ugd/b8c837_dbf61614925c45b59beeea5a0c209236.pdf
    • https://static.usrfiles.com/ugd/b8c837_c073f7fb8983403b8d56dcbab6aafbb8.pdf
    • https://static.usrfiles.com/ugd/b8c837_0426e0383324440681404eb86a2f10f8.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_off00005296.bin
375bba4092e52c1b7de496805e13c1f486871f11378986df197d94cda8c413f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5296 5248 bytes
font_01_sfnt_off00006478.bin
c01c44ec74e7db0eb18783a2d9c669499644dcbfccd665fa832f156066e2436f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6478 9872 bytes

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