Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa4d3bc9af5ae005…

MALICIOUS

PDF

35.0 KB Created: 2020-08-21 19:18:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6d14e6501bc9d279a48739528170fc5 SHA-1: 62bfff23a06de3bfa96e841f293e6cdfa928a5c0 SHA-256: fa4d3bc9af5ae00522b331865c368ce4307858c82eb6c44b93308630c992cd37
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to funnel victims to further malicious content. The document also contains a large number of links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning attempt to improve search engine ranking for malicious content. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=catanzaro+informa+cronaca+di+oggi
    • http://files.ljkplumbingandheating.co.uk/uploads/1/3/1/3/131378990/gamiru-mogejeparoten.pdf
    • http://files.geoffx.com/uploads/1/3/2/3/132302735/c210955b47bde8.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/15641153792.pdf
    • https://cdn.shopify.com/s/files/1/0429/6107/6387/files/54710856342.pdf
    • https://cdn.shopify.com/s/files/1/0438/2661/0333/files/50780758621.pdf
    • https://cdn.shopify.com/s/files/1/0428/1139/2167/files/38702353163.pdf
    • https://cdn.shopify.com/s/files/1/0435/2652/0986/files/disofogawejomigebob.pdf
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/zilubadutudifavoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/8634/7414/files/bismarck_foreign_policy.pdf
    • https://cdn.shopify.com/s/files/1/0431/8802/7555/files/gza_4th_chamber.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5211/files/relujoziguzefave.pdf
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/3659120121.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/kukolizinebefizifam.pdf
    • https://cdn.shopify.com/s/files/1/0440/1243/7662/files/31806277332.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_off000049a5.bin
c6c69d87629b8cf329a44576d560351490f5d47a7bc567b87bc7ef2d37b872c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49A5 5084 bytes
font_01_sfnt_off00005ade.bin
dcf28e16b56681507a861bad80f2dd031f0f561a1445c2213380aaa79011c0a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ADE 10952 bytes

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