Malicious PDF — malware analysis report

Static analysis result for SHA-256 74bf7b71aa2e5299…

MALICIOUS

PDF

39.6 KB Created: 2020-08-24 22:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3906ddf217a6251c56c93acff8c2406 SHA-1: 502c002f9840d0b1d8efa5e572324b726d28e412 SHA-256: 74bf7b71aa2e5299944af4fbabe5230d38c4f8606837d4c22df85433926e15cc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests the document is part of a link farm or SEO manipulation scheme designed to lead users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=lakeside+thurrock+store+guide
    • http://files.fosterenterprises.com/uploads/1/3/2/6/132681409/6946418.pdf
    • http://files.sharonbasketball.org/uploads/1/3/1/3/131380618/6522916.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/7138/0383/files/80126927563.pdf
    • https://cdn.shopify.com/s/files/1/0429/2807/9004/files/enneagram_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/6428/5601/files/talani.pdf
    • https://cdn.shopify.com/s/files/1/0432/0411/6637/files/roteloxatufiwetetirifi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8758/3650/files/43664443159.pdf
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/sivav.pdf
    • https://cdn.shopify.com/s/files/1/0437/7142/9016/files/kikosuki.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6725/files/nusunikewinilimesan.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5013/files/bifatoruxava.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1415/files/47012521950.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ddc.bin
15029fdb4f2df7d0531ae59df8da067878d4b6fbe5ab8ef7ad4e8f603af7cc58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DDC 5176 bytes
font_01_sfnt_off00006f69.bin
239f1f14d8c65bef8482b19e21da7d94ef0c646939f712e8eba8dc0bb3fe3d4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F69 10088 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.