Malicious PDF — malware analysis report

Static analysis result for SHA-256 c720fc97a173f5ac…

MALICIOUS

PDF

40.4 KB Created: 2020-08-30 09:13:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51a3ae764d725fc3b8db3bd65f2cf9f2 SHA-1: 3532d1139f8b094cfef4972f1fbe5fd1d0d4ec5e SHA-256: c720fc97a173f5ace62aa5485e9ebed8d0e3e792e36a9ae432ab7c56ecf0e961
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. Additionally, PDF_SEO_LINK_FARM indicates a large number of external PDF links, likely for SEO manipulation or to host further malicious content. The primary malicious URL identified is https://ttraff.com/wix?keyword=juramento+de+cambio+de+escolta, which is likely used to redirect users to a malicious site. The document body contains obfuscated text but also includes the malicious URL and several Shopify-hosted PDF 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=juramento+de+cambio+de+escolta
    • https://cdn.shopify.com/s/files/1/0464/9756/2776/files/kinewuzuwure.pdf
    • https://cdn.shopify.com/s/files/1/0435/6790/6975/files/gukojakulebapadi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mafimovudowejiner.pdf
    • https://cdn.shopify.com/s/files/1/0465/0034/8062/files/anatomy_muscle_actions_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6976/files/31150201397.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/zoroko.pdf
    • https://cdn.shopify.com/s/files/1/0434/3185/4247/files/suxegod.pdf
    • https://cdn.shopify.com/s/files/1/0434/1638/7733/files/47341141372.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4454/files/4th_grade_math_placement_test_california.pdf
    • https://cdn.shopify.com/s/files/1/0434/7792/6040/files/entourage_season_3_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0432/2590/7368/files/xugakunegisagofinugiga.pdf
    • https://static.usrfiles.com/ugd/c33cdb_fbc5b26a06eb484e96d3e8c52b01b908.pdf
    • https://static.usrfiles.com/ugd/0f1814_97aac2d74f0f42708622799593e5dd3e.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_off00005ea0.bin
46ea8f542e396d785651e87a2f10fd3312cd10fff1d35f0b5e313d1827a306b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA0 5216 bytes
font_01_sfnt_off00007039.bin
96ccac83f96e40f3f45fcbf3003322d2258188096615d9b2242b5ea96a750f52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7039 11404 bytes

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