Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e2e9e7df41cb91…

MALICIOUS

PDF

43.8 KB Created: 2020-08-19 19:55:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90017bf1a16820fd2f44560bb6b166ba SHA-1: e72245de2ee9164d8f38ef8d0d21139a804bf2ba SHA-256: e2e2e9e7df41cb91efb6da1e7b8b94f1d6fc5f85dbaba53708dec5b21da397a1
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to artificially inflate search engine rankings. One of these links, https://ttraff.ru/pify?keyword=swiftui+by+tutorials+pdf, is identified as a malicious redirector. The document body is heavily obfuscated and appears to contain junk data, but the malicious URL is clearly visible within it. The primary attack pattern is to direct users to malicious infrastructure through these embedded links.

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=swiftui+by+tutorials+pdf
    • http://files.sry.com.tw/uploads/1/3/2/6/132681824/zajanupubo.pdf
    • http://guxubowuk.oceansidesda.com/uploads/1/3/2/3/132303124/wabaperadus.pdf
    • http://files.younggassers.org/uploads/1/3/0/9/130969772/nubawelatuwur.pdf
    • http://zogego.callanjames.co.nz/uploads/1/3/2/8/132814930/2df2b925d9ddc.pdf
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/top_funniest_family_feud_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/7677/0205/files/67183806185.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30408896218.pdf
    • https://cdn.shopify.com/s/files/1/0436/1220/9315/files/google_earth_weather.pdf
    • https://cdn.shopify.com/s/files/1/0434/9578/4600/files/90463955927.pdf
    • https://cdn.shopify.com/s/files/1/0430/8375/9765/files/61749419699.pdf
    • https://cdn.shopify.com/s/files/1/0432/7764/8027/files/bilit.pdf
    • https://cdn.shopify.com/s/files/1/0428/4809/2323/files/91097476516.pdf
    • https://cdn.shopify.com/s/files/1/0432/1355/3827/files/cambridge_international_as_and_a_level_computer_science_coursebook.pdf
    • https://cdn.shopify.com/s/files/1/0428/1165/4307/files/36222848286.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/download_free_ringback_tone.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_off00006b48.bin
8cd2cfa4e843f61bb54be82fa4675b4db805ee7819bf7592756acac83208d283		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B48 5472 bytes
font_01_sfnt_off00007df6.bin
4144e058c86dbb75c69fce4bcc67784f5857730e9044304e4752a6f5494d243d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF6 10764 bytes

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