Malicious PDF — malware analysis report

Static analysis result for SHA-256 e276ef8a4ee51501…

MALICIOUS

PDF

47.4 KB Created: 2020-08-31 11:05:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbdef5b00011aa62622133a29ca64c0d SHA-1: 867e02cb90d80499852db2ce691ef3ea4fcc2acc SHA-256: e276ef8a4ee515014b1e6575b1e97a7b0fa70c7438d759747c97e7135113ffe7
150 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, but one critical link directs to a known malicious redirector at ttraff.com. This suggests a link farm or SEO poisoning tactic designed to lure users to malicious content. The ML classifier also strongly indicated maliciousness.

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.com/wix?keyword=fam%25C3%25ADlia+de+10+integrantes+do
    • https://cdn.shopify.com/s/files/1/0435/4162/7029/files/tipos_de_cestodos.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3866/files/anvil_studio_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2383/files/darobewumof.pdf
    • https://cdn.shopify.com/s/files/1/0429/7005/4805/files/raboxexovogesenijutekom.pdf
    • https://cdn.shopify.com/s/files/1/0427/5086/9671/files/importance_of_play_based_learning_in_early_childhood.pdf
    • https://cdn.shopify.com/s/files/1/0435/6122/2307/files/breakthrough_basketball_drills.pdf
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/64617749837.pdf
    • https://cdn.shopify.com/s/files/1/0436/1243/8685/files/bordered_hessian_determinant.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/dadowe.pdf
    • https://cdn.shopify.com/s/files/1/0463/4119/3885/files/baroboxarunux.pdf
    • https://cdn.shopify.com/s/files/1/0440/1178/2309/files/bridge_constructor_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/1357/0709/files/kizebilorofanerafis.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_off000078df.bin
e5e64bf125adb8d6f60c99e1d3d28932eb91220d7ee268fe440b0c392333009b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78DF 5348 bytes
font_01_sfnt_off00008b00.bin
ebda7c750d1823b68647737b013397aeb4da618390ea25d301e5cb0013ac7434		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B00 12048 bytes

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