Malicious PDF — malware analysis report

Static analysis result for SHA-256 943ae3087c74908e…

MALICIOUS

PDF

42.7 KB Created: 2020-08-23 17:23:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d2db260ff62877af9735a2dc99d4501 SHA-1: 45ed9e522dbc6f8415f7adfe8365e5e757cc30e3 SHA-256: 943ae3087c74908e07e904ff346c658dcb164c563bdaa38f58529a3134578e35
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a link farm, indicating an attempt to distribute malicious content. The document body, though heavily obfuscated, contains text related to 'violin sheet music for beginners free' and the malicious URL, suggesting a lure. The primary malicious URL is https://ttraff.cc/pify?keyword=violin+sheet+music+for+beginners+free, which likely leads to further malicious content.

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/pify?keyword=violin+sheet+music+for+beginners+free
    • http://vavigif.nicholasmongiardocooper.com/uploads/1/3/1/0/131070450/xebesukag_kokimok_nurise.pdf
    • https://cdn.shopify.com/s/files/1/0434/8379/1517/files/capacitores_en_serie_y_paralelo_ejercicios_resueltos.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3592/files/49596637482.pdf
    • https://cdn.shopify.com/s/files/1/0432/2813/5591/files/fevutebesuwu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1795/3702/files/16240810863.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/social_psychology_elliot_aronson_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/0758/0072/files/55386836454.pdf
    • https://cdn.shopify.com/s/files/1/0429/3325/6345/files/mejuxojuzewiwek.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/suramagufumaxuragozud.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_off000068a4.bin
9732dbd14354633b450ee7daa5c00e85c3c8d95e4a0bade3552e7c5554ca821d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68A4 5188 bytes
font_01_sfnt_off00007a25.bin
97922a6bc8f79b6ceb936d8f79fb1a3dc651f2fb9637965a6a688fcda66d5921		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A25 10620 bytes

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