Malicious PDF — malware analysis report

Static analysis result for SHA-256 d467b9abdd805d57…

MALICIOUS

PDF

48.7 KB Created: 2020-07-19 22:01:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f365958a373a628c4c6165a48733663 SHA-1: 704fbbf3ee0ec07c9b5b186ff65dbca19b871f8b SHA-256: d467b9abdd805d5701300158b6fba7e49646438a8b6a44348e63b7a70f151f92
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as search results for a popular book, likely to trick users into clicking. The primary link, 'https://ttraff.ru/wb?keyword=python%20crash%20course%20pdf%202018', points to a known malicious redirector. The document body is heavily obfuscated and does not provide clear textual content for analysis.

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/wb?keyword=python%20crash%20course%20pdf%202018
    • http://files.yourschoollibrary.net/uploads/1/3/1/6/131637656/xikejurudujop-jowaz-vobewizu.pdf
    • http://files.drummermama.com/uploads/1/3/0/7/130776101/revazogedado.pdf
    • http://files.bsmga.com/uploads/1/3/0/7/130776049/bitabavawedanoj.pdf
    • http://files.mylunarsign.com/uploads/1/3/1/8/131857482/6fcae3.pdf
    • https://fuwewosalija.files.wordpress.com/2020/07/tigefapageda.pdf
    • https://weliwililego.files.wordpress.com/2020/07/47610931733.pdf
    • https://furirod.files.wordpress.com/2020/07/99474741858.pdf
    • https://kiwepolojaka925135824.files.wordpress.com/2020/07/kajufizofexujofas.pdf
    • https://fugonef.files.wordpress.com/2020/07/setusudidifafilukowumobax.pdf
    • https://bugigos.files.wordpress.com/2020/06/sobebusazomivosobedul.pdf
    • https://sidakosobo.files.wordpress.com/2020/07/91089147497.pdf
    • https://cdn.shopify.com/s/files/1/0432/8115/4198/files/54540704492.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94448736580.pdf
    • https://cdn.shopify.com/s/files/1/0431/4021/9041/files/25229550995.pdf
    • https://cdn.shopify.com/s/files/1/0428/8669/3023/files/jabuwewesabedisuso.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/78817448657.pdf
    • https://cdn.shopify.com/s/files/1/0434/8729/7696/files/57792274102.pdf
    • https://cdn.shopify.com/s/files/1/0429/9181/2767/files/sibigugafe.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_off000070f8.bin
3ab42d0b75837d2222e6640f076f0bf5847fd4c62b4b2954c07c5d97edb127ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70F8 5668 bytes
font_01_sfnt_off00008438.bin
31d2ad4f020c5ecc10dbed22abdcfc6dacfae748cc6d1b209c814627551b613b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8438 16904 bytes

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