Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f745e91b0a8214a…

MALICIOUS

PDF

43.0 KB Created: 2020-07-26 04:02:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b08a2e8049254dfa70481bc45432f865 SHA-1: 6083db4dd39954a54425a071e2c24916e6d516cf SHA-256: 8f745e91b0a8214a637b1f734a2586fdc17778321c585067a604611bb1ca6fa4
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also assigned a high probability of maliciousness. The primary malicious URL identified is ttraff.ru, which is known for redirecting users to potentially harmful content. While no scripts were extracted, the sheer volume of outbound links suggests a coordinated effort to drive traffic to malicious or deceptive websites.

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=episode+guide+this+is+us+season+2
    • http://files.flagstaffescapespace.com/uploads/1/3/2/6/132681343/sufexipa_muxagezaleto_gujuj.pdf
    • http://files.rcdavis-tellinstories.com/uploads/1/3/1/3/131383624/ebc2656e5828c5.pdf
    • http://files.katherineboener.com/uploads/1/3/0/7/130775980/nizedexulerobo-wiwajuje-miwatafu-zofobipojoro.pdf
    • http://files.schmittwoodworkingllc.com/uploads/1/3/1/4/131407921/6871751.pdf
    • http://files.schmit
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/wowuxibilapewa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70354855800.pdf
    • https://cdn.shopify.com/s/files/1/0436/0945/6803/files/govur.pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/81938101050.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/72713897088.pdf
    • https://cdn.shopify.com/s/files/1/0435/3867/7924/files/30661114630.pdf
    • https://cdn.shopify.com/s/files/1/0437/2201/4870/files/98489400513.pdf
    • https://cdn.shopify.com/s/files/1/0430/5184/3737/files/niwopixozure.pdf
    • https://cdn.shopify.com/s/files/1/0430/8588/9689/files/70766518093.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/loxakifetab.pdf
    • https://cdn.shopify.com/s/files/1/0430/1714/2433/files/12274631675.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/foxewaxejitorigagorizu.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_off00006bff.bin
e576b293ab0dbfc8e4aeec5b18eb2ad9af481de56ab62a6df3774cae0764e8a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFF 5064 bytes
font_01_sfnt_off00007d34.bin
6ea81b977b3e84fbf5ad87c1cb5e81adde95031327db372616608114fcfa6e5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D34 9864 bytes

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