Malicious PDF — malware analysis report

Static analysis result for SHA-256 174f39f7cc253715…

MALICIOUS

PDF

35.0 KB Created: 2020-08-29 08:21:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f349707a47559afb0dd7e20a7db06347 SHA-1: 4655c7bdd0dd2da59144d39bc36dd684ff47f27d SHA-256: 174f39f7cc253715d2a503a4df0e1f9a84cd4b0a43031cd855f1e1a13f757eeb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm of numerous external PDF files hosted on Shopify, likely to manipulate search engine results or distribute malicious content. One of the primary links directs to a known malicious redirector infrastructure, suggesting an attempt to lead the user to a harmful site. No scripts were extracted, but the presence of embedded URLs and the link farm heuristic strongly indicate a malicious intent to redirect users.

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.club/wix?keyword=xenoverse+2+xp+farm
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1723/9704/files/prime_primer_gungeon.pdf
    • https://cdn.shopify.com/s/files/1/0434/6642/4477/files/mulojeziwilejuxotitip.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/chinese_restaurant_process.pdf
    • https://cdn.shopify.com/s/files/1/0437/8217/6920/files/11967956835.pdf
    • https://cdn.shopify.com/s/files/1/0434/6114/8837/files/63079685980.pdf
    • https://cdn.shopify.com/s/files/1/0435/6807/0824/files/18560357145.pdf
    • https://cdn.shopify.com/s/files/1/0463/3110/1346/files/kota_the_friend_foto_free.pdf
    • https://static.usrfiles.com/ugd/b8c837_a1e7fd6b7d0d4367a3464d8499e6768d.pdf
    • https://static.usrfiles.com/ugd/b8c837_321e63a406674f84b0232b4cc4073adf.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_off00004b5d.bin
cf9c71d4dc5634a9e4931a37a5a6b0e469ccf497e65a6511ae86eab6a6571502		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B5D 5252 bytes
font_01_sfnt_off00005d2a.bin
d063dc46255b671cfaeb1c6b75ab39b048cb4fa30ed0fe2b6067eca075b2721c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D2A 10232 bytes

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