Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8112e90a3464672…

MALICIOUS

PDF

39.9 KB Created: 2020-08-19 08:44:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b02466be665d89b56790c06f57f9a765 SHA-1: 3ffa341a69a94cf868135e3dde8ae5436db3f778 SHA-256: b8112e90a3464672769d66335ecbf46350f86965748fb0319264c502aee23a48
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious due to a high number of embedded links, with one specifically pointing to a known malicious redirector. The document body contains garbled text but also includes the URL 'https://ttraff.ru/pify?keyword=partners+in+performance+america', which is identified as a malicious redirector. The presence of a link farm suggests an attempt to distribute malicious content or phish users. No scripts were extracted from this sample.

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=partners+in+performance+america
    • http://fokepu.physiciansprimarycare.org/uploads/1/3/0/8/130814238/sajumewijesos-bemupud.pdf
    • http://files.southernstyledevents.com/uploads/1/3/1/1/131163635/4efe38d.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61259485886.pdf
    • https://cdn.shopify.com/s/files/1/0443/1613/1484/files/gejewakij.pdf
    • https://cdn.shopify.com/s/files/1/0440/6119/6440/files/arkham_origins_cold_cold_heart_dlc.pdf
    • https://cdn.shopify.com/s/files/1/0437/8879/6065/files/diweserixazipanomafetoxol.pdf
    • https://cdn.shopify.com/s/files/1/0438/4456/7197/files/cards_against_muggles_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/0932/5730/files/nukanojasalododudufuma.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7997453156.pdf
    • https://cdn.shopify.com/s/files/1/0433/4583/8232/files/disukupiguwa.pdf
    • https://cdn.shopify.com/s/files/1/0439/8402/7806/files/xeviderinamupolobaje.pdf
    • https://cdn.shopify.com/s/files/1/0447/9365/9543/files/advanced_java_tutorial_tutorialspoint.pdf
    • https://cdn.shopify.com/s/files/1/0431/0230/6468/files/botanica_oculta_paracelso.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_off00005ed3.bin
b30bb6ae1ae4f5ea45af5928fedd2b5a47f41b80c4308c14ea95281e269146d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED3 5128 bytes
font_01_sfnt_off00007029.bin
ad0f1429a720ac5860029e336e5786b194688161dd69ddc73e55ef41da46eee6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7029 10248 bytes

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