Malicious PDF — malware analysis report

Static analysis result for SHA-256 971e69aaaeb1da7f…

MALICIOUS

PDF

68.2 KB Created: 2020-08-30 20:39:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce2eb110fac762260dbddcf290d44d65 SHA-1: b4f7894c158813e676f1699557d967a2f5ac4aad SHA-256: 971e69aaaeb1da7f6e86e8b4b7cb25420f32ccd71d14eecc0541fe202cd57988
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.ru/wix?keyword=abstract+and+concrete+nouns+1+lost+a'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains. The ML classifier strongly indicates maliciousness, suggesting the document's primary purpose is to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=abstract+and+concrete+nouns+1+lost+a
    • https://cdn.shopify.com/s/files/1/0429/8817/5519/files/todumafixujuviveze.pdf
    • https://cdn.shopify.com/s/files/1/0431/2494/9153/files/minolta_bizhub_c308_manual.pdf
    • https://cdn.shopify.com/s/files/1/0446/6619/2035/files/71761663967.pdf
    • https://cdn.shopify.com/s/files/1/0464/0545/1931/files/basha_songs_isaimini.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f5df364077b4c2c9bb7c1e71aeafdba.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d8179d1e34848bc88fe64cc0c54dca9.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d1585b03d2447ef80abc8ce87e08c31.pdf
    • https://static.usrfiles.com/ugd/5899d5_3175ca71e61f437ea6f575c54b0434a2.pdf
    • https://cdn.shopify.com/s/files/1/0436/0532/8034/files/91494684097.pdf
    • https://cdn.shopify.com/s/files/1/0463/5023/7858/files/fujitikinugepov.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7394/files/besm_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0438/4112/6565/files/nudukunonise.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/
    • https://cdn.shopify.com/s/files/1/0464/0545

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000afa2.bin
3b89a1333aa93e194de12c5c5da229a8f3a969ace6b07a90c5323b9ece6747ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFA2 2828 bytes
font_01_sfnt_off0000b99d.bin
815752655bff429c5b295187d7bcb3579ec3480aa7d93b24fdb8131e1c4b980d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB99D 4948 bytes
font_02_sfnt_off0000ca6e.bin
edbf23237fa421ec72280641e53b53606b3b1b8b8cda23bcfe0b1c001991e81f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA6E 13604 bytes
font_03_sfnt_off0000f53a.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF53A 4324 bytes

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