Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1c9bcd89f118bbb…

MALICIOUS

PDF

39.4 KB Created: 2020-08-24 19:40:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c151f21602993cbdd248e2f8e64a53d3 SHA-1: b24b7df7f04c95709968ed5c9ca54bd2e2b40ba0 SHA-256: b1c9bcd89f118bbb2ab83d70477f491f719fb39a06a02c781d1df86602cd6239
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The primary malicious URL, https://ttraff.ru/pify?keyword=composites+science+and+technology+guide+for+authors, is part of a redirection chain. The document body contains garbled text but includes the same malicious URL, suggesting an attempt to disguise the malicious intent.

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=composites+science+and+technology+guide+for+authors
    • http://files.armadilloescaperoom.com/uploads/1/3/2/8/132815365/viwefijefeta.pdf
    • https://cdn.shopify.com/s/files/1/0427/6954/7431/files/free_individual_development_plan_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/8290/6789/files/kovejadumo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/pogiginefade.pdf
    • https://cdn.shopify.com/s/files/1/0430/5027/0869/files/84551871574.pdf
    • https://cdn.shopify.com/s/files/1/0430/4879/6309/files/36145903656.pdf
    • https://cdn.shopify.com/s/files/1/0437/0192/8104/files/anatomie_de_l_oreille_interne.pdf
    • https://cdn.shopify.com/s/files/1/0428/3331/3958/files/reporter_definition_government.pdf
    • https://cdn.shopify.com/s/files/1/0436/9999/4789/files/17899035419.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_off00005c2e.bin
ade4be9e8d3094dc7168ed0337ab69ccf5d4a67e4809926e80975e1dc2173839		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C2E 5576 bytes
font_01_sfnt_off00006eff.bin
c237b0cfce40dc5184f8e180bb909e40ff53ec0f9b34dec8340d1bd0c3ced1e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFF 9956 bytes

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