Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe93bf8b8892559…

MALICIOUS

PDF

43.2 KB Created: 2020-08-20 04:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4eeae5c8604d91db3dbe9b8258338be4 SHA-1: d57eecca9d52561e1ca845d8fddeb65c169575af SHA-256: afe93bf8b88925596b45a0dc304c0731b11bb13760401cc375a10c265697e6bd
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.ru/pify?keyword=convert+pdf+to+word+nitro+pdf+reader', is designed to trick users into believing they are accessing a legitimate PDF conversion tool. The file also contains a PDF link farm heuristic, indicating a large number of outbound links, many of which point to benign Shopify domains but also include other unknown domains.

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.ru/pify?keyword=convert+pdf+to+word+nitro+pdf+reader
    • http://files.laedgefilmawards.com/uploads/1/3/2/6/132695575/2eaa64983fc1045.pdf
    • http://jotifajam.ramsclubswimming.org/uploads/1/3/1/3/131379808/daxipurefezes-daxisovus-pomujuduj.pdf
    • https://cdn.shopify.com/s/files/1/0432/0369/0660/files/listado_de_adjetivos_en_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0431/5679/9648/files/properties_of_acetic_acid.pdf
    • https://cdn.shopify.com/s/files/1/0430/6114/9850/files/16783664235.pdf
    • https://cdn.shopify.com/s/files/1/0429/1146/5631/files/binuwuxiradenebipoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/20859352472.pdf
    • https://cdn.shopify.com/s/files/1/0435/5493/0839/files/convertir_un_a_word_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/9619/3686/files/riesgo_biologico_colombia.pdf
    • https://cdn.shopify.com/s/files/1/0435/1570/7551/files/lavenejufamawonijadoxop.pdf
    • https://cdn.shopify.com/s/files/1/0432/7004/5864/files/34821421128.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_off00006c8e.bin
69965c11397a7c6c5841a99302d30fca19e76541cba5cce1a5ff59ee77b3d5c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8E 4884 bytes
font_01_sfnt_off00007d4c.bin
11c07e23a80d0663dab31fac125a7d5bcf1e6bef5c31e43c0e8df0b9b51caff2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4C 10196 bytes

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