Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bf46b738960ce7a…

MALICIOUS

PDF

48.4 KB Created: 2020-08-16 18:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0045a2ec24d0d61fb2fd1eec5792889 SHA-1: 9c714a8c68f339b0a03968a05934349fad06fed0 SHA-256: 8bf46b738960ce7a248ac292f7ad0796984d2d168618b5ad38ec08baf1b3694c
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though partially corrupted, contains the text 'Dental infection antibiotics guidelines' and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing confirms the presence of a link to malicious infrastructure.

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.cc/pify?keyword=dental+infection+antibiotics+guidelines
    • http://files.jaredjaggers.com/uploads/1/3/1/4/131453111/susezotuwimut_vanela_babokejite.pdf
    • http://zafoful.wdspa.com/uploads/1/3/2/6/132681647/2121003.pdf
    • http://vetud.asiamusicalproductions.com/uploads/1/3/1/4/131482975/devubu.pdf
    • https://cdn.shopify.com/s/files/1/0441/4429/6088/files/porerujupekuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/39412968133.pdf
    • https://cdn.shopify.com/s/files/1/0433/7667/2918/files/40901249237.pdf
    • https://cdn.shopify.com/s/files/1/0428/7568/2972/files/gikawomus.pdf
    • https://cdn.shopify.com/s/files/1/0430/3601/6802/files/53686856422.pdf
    • https://cdn.shopify.com/s/files/1/0438/5341/4565/files/babylonian_creation_story.pdf
    • https://cdn.shopify.com/s/files/1/0440/0375/4142/files/blank_dd214.pdf
    • https://cdn.shopify.com/s/files/1/0433/9888/9621/files/furajoxiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/4575/6821/files/definition_and_scope_of_community_pharmacy.pdf
    • https://cdn.shopify.com/s/files/1/0430/6393/5129/files/mikedizorele.pdf
    • https://cdn.shopify.com/s/files/1/0437/7749/1093/files/blank_biodata_form_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/xeduzexosagamovuxolenonu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/1280493251.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_off00007fca.bin
a7d68ff9e3025d771755620030197cd4e965b523d5f6d84a3d6f41a765725946		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FCA 5232 bytes
font_01_sfnt_off000091a9.bin
765a94f2830c9a1f504159d3b29da26fd7985afdb4fc7744b3e8da242c593487		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91A9 10144 bytes

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