Malicious PDF — malware analysis report

Static analysis result for SHA-256 8866fa76a09fe61e…

MALICIOUS

PDF

39.3 KB Created: 2020-08-22 19:59:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b410ca5dca95d3d2d53d6e1461c2f959 SHA-1: 4d2c28f6e8ef5cd5449351fa9fa605e3fdc30d2d SHA-256: 8866fa76a09fe61e48b262585dbf1f1babe2be0254c851237acc9c547b4f276c
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, characteristic of a link farm designed to manipulate search engine rankings or distribute malicious content. One of these URLs, 'https://ttraff.ru/pify?keyword=bcca+prostate+cancer+guidelines', is identified as a malicious redirector. The presence of this redirector suggests the document is intended to lure users to malicious sites, likely for phishing or malware distribution.

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=bcca+prostate+cancer+guidelines
    • http://fadota.tribalsoupproject.com/uploads/1/3/0/7/130738993/bakunuvadix.pdf
    • https://cdn.shopify.com/s/files/1/0445/4963/6255/files/compound_personal_pronouns_worksheet_for_grade_4.pdf
    • https://cdn.shopify.com/s/files/1/0437/0743/3125/files/dungeon_keeper_2_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/77742311313.pdf
    • https://cdn.shopify.com/s/files/1/0437/8515/8807/files/academic_literacy_test.pdf
    • https://cdn.shopify.com/s/files/1/0430/4365/1741/files/jikanubiwazujewotawe.pdf
    • https://cdn.shopify.com/s/files/1/0431/7249/5524/files/84395574901.pdf
    • https://cdn.shopify.com/s/files/1/0438/8916/4440/files/queen_s_gambit_declined_vienna.pdf
    • https://cdn.shopify.com/s/files/1/0431/7783/6703/files/bill_winston.pdf
    • https://cdn.shopify.com/s/files/1/0437/0779/3561/files/dulijoxugafugoneviwuxuje.pdf
    • https://cdn.shopify.com/s/files/1/0431/8747/0494/files/netenafaxozox.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_off00005d82.bin
49a1f3bdc29e73913815471dbcd3d7b8768e44dca09814f7a3977248e09b29c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D82 5292 bytes
font_01_sfnt_off00006f7f.bin
34d5bc2e534b132f65a11178822598a367ba9fe203d1bbb7c6709cf50c72f204		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7F 9664 bytes

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