Malicious PDF — malware analysis report

Static analysis result for SHA-256 9faaaee09761a773…

MALICIOUS

PDF

46.7 KB Created: 2020-08-07 15:20:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e9e19233added3d21cad429bb376dd3 SHA-1: cd2cff6bc93b788d0485f436fbc1f2c194dc059a SHA-256: 9faaaee09761a773268df9dae00a9bf1d5a8737ee4df93294b51ca034c1a127e
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic firing indicates that a link within the document redirects to known malicious infrastructure at 'ttraff.cc'. This suggests the document is designed to lead users to malicious sites under the guise of providing a download for an 'advanced auditing textbook'.

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=advanced+auditing+textbook+pdf
    • http://files.oskie.net/uploads/1/3/1/0/131071157/muvekugifunefukumes.pdf
    • http://files.marshmyers.com/uploads/1/3/0/8/130814032/818592.pdf
    • http://files.huntersvillepres.org/uploads/1/3/1/4/131408203/ruzowap.pdf
    • https://cdn.shopify.com/s/files/1/0440/9622/5432/files/bb_apps_world_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/6370/4729/files/budapest_tour_guide.pdf
    • https://cdn.shopify.com/s/files/1/0445/4517/9807/files/remove_office_2016_product_key.pdf
    • https://cdn.shopify.com/s/files/1/0435/0532/0088/files/zaparugugoxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6688/4250/files/vatataguxuripanesi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0386/1401/files/building_management_ordinance.pdf
    • https://cdn.shopify.com/s/files/1/0429/7555/9829/files/80745157240.pdf
    • https://cdn.shopify.com/s/files/1/0431/7108/6492/files/academic_word_list_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/4647/5678/files/nirupoxuxuzuwixesikig.pdf
    • https://cdn.shopify.com/s/files/1/0430/7818/9205/files/tadurakulakujivobade.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_off000077dd.bin
a4d0d432d72eab3d9832d8bde56bad6604fcb12123799b198c1aba3d5988db35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77DD 5340 bytes
font_01_sfnt_off00008a2b.bin
adbfdf3c8af76c45d596c916c14c9bce24041fd5a09e82744d888f00b822010d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A2B 10548 bytes

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