Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f4e566f810b48e…

MALICIOUS

PDF

42.1 KB Created: 2020-08-01 11:41:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23d260f10a44045a04cb263f270832c8 SHA-1: 0f78c6f662680e120ec535d55e298d2cb4437733 SHA-256: 00f4e566f810b48eb6e86e70f6a9658a782eee971a54c8923f8d549a37f589f6
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which likely serves as the initial entry point for further malicious activity. 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.com/pify?keyword=etc%252F+nginx%252F+sites-+available%252F+example.+com
    • http://files.priscillawakefield.uk/uploads/1/3/1/1/131163872/jifoxun.pdf
    • http://files.belzevfilms.com/uploads/1/3/0/9/130969083/723f29a0c28.pdf
    • http://files.urbanbillionaire.com/uploads/1/3/0/7/130776308/5642874.pdf
    • http://files.dianastapleton.com/uploads/1/3/2/7/132712325/24ef14e53.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0811/5366/files/22721161632.pdf
    • https://cdn.shopify.com/s/files/1/0434/0334/6078/files/nopedinunabowixap.pdf
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/58609387755.pdf
    • https://cdn.shopify.com/s/files/1/0428/4225/9612/files/kawusiwezepevaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/8680/7201/files/jozipopo.pdf
    • https://cdn.shopify.com/s/files/1/0436/2331/7662/files/vibiwuxijubefasevawabir.pdf
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/72017591235.pdf
    • https://cdn.shopify.com/s/files/1/0436/9544/0040/files/jimebibowe.pdf
    • https://cdn.shopify.com/s/files/1/0437/0379/5877/files/76596751050.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6491/files/kewugu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0120/9251/files/zorobuwewudizaduzevebon.pdf
    • https://cdn.shopify.com/s/files/1/0434/5656/1318/files/visizibozaru.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_off00005be3.bin
9ee628f242f81b83ba6fbcd9d351083f813a79149205a3ad21fb7a6bc8d45c0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE3 5480 bytes
font_01_sfnt_off00006e9e.bin
cb27aa97612a8fef8f5d1cb64ba4801212707d072592c777af571d8d1e7b93e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9E 14072 bytes