Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b1ec7140745f7f6…

MALICIOUS

PDF

35.9 KB Created: 2020-08-25 03:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78ecfc0d0671a6edc5a4725586cadaf1 SHA-1: 912732e906b1b1d4bb99fc6580531a83661d277d SHA-256: 2b1ec7140745f7f65ef3bd5b0b3fe0eb5e52c8b96bce8179c242a325293f2dcb
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic match for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=ancient+egypt+afterlife+worksheet', which is likely the lure. The PDF also exhibits characteristics of a PDF_SEO_LINK_FARM, with numerous external links, many hosted on Shopify. The primary intent appears to be redirecting the user to a malicious site via the embedded link.

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=ancient+egypt+afterlife+worksheet
    • http://vedesaxen.vinified.co.uk/uploads/1/3/2/7/132712615/d7ded195c47fb.pdf
    • http://files.dynamissconsultancy.com/uploads/1/3/1/3/131384583/fd1450.pdf
    • http://vekasi.crprentice.com/uploads/1/3/2/6/132682347/2489684.pdf
    • http://files.allroundrendering.com/uploads/1/3/1/0/131070581/3bbc7dd52d8f4.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/naximasukafutususuru.pdf
    • https://cdn.shopify.com/s/files/1/0434/8303/7860/files/lixopolawokuwozado.pdf
    • https://cdn.shopify.com/s/files/1/0435/6875/8943/files/6515879862.pdf
    • https://cdn.shopify.com/s/files/1/0431/4644/4960/files/tutorial_hack_kali_linux_bahasa_indonesia.pdf
    • https://cdn.shopify.com/s/files/1/0438/5131/7408/files/lonexijibajaxeb.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/duxitobi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3198/files/manual_bases_de_datos_relacionales.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/rodojav.pdf
    • https://cdn.shopify.com/s/files/1/0435/1344/6564/files/kerematamiwanomopo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/fifopoxuwadezalebibenana.pdf
    • https://cdn.shopify.com/s/files/1/0462/5937/2183/files/zomupuviterinodo.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_off00004eed.bin
0d5e97d562fe51ff246657005fc9641595ba0125bdaba8a27bbf354f7f3c71c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EED 5524 bytes
font_01_sfnt_off000061cb.bin
5ad6077967e49dddc78856de04de90f9a7ac629e8e0b0b991d650207e87899eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61CB 9772 bytes

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