Malicious PDF — malware analysis report

Static analysis result for SHA-256 b426550f0b6864d5…

MALICIOUS

PDF

36.2 KB Created: 2020-08-30 07:14:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e637e3d54570ce601aef3ac5d60fd58 SHA-1: a2a6e78773834db9ecbb48b53c42aed738301eb5 SHA-256: b426550f0b6864d56b5d347ebf07eea3b02adfb7c46fb007748c611b044afb51
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to a known malicious redirector, specifically `https://ttraff.ru/wix?keyword=teaching+feeling+1.9.2+download`. The document body, though heavily obfuscated, contains text related to software downloads and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a large number of embedded links, many pointing to Shopify, further supports the SEO link farm heuristic, indicating an attempt to manipulate search results for malicious purposes.

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/wix?keyword=teaching+feeling+1.9.2+download
    • https://cdn.shopify.com/s/files/1/0433/9109/0844/files/pusotadupidinuwogisoful.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/ladeworamam.pdf
    • https://cdn.shopify.com/s/files/1/0438/4676/2656/files/best_website_to_movies_on_laptop.pdf
    • https://cdn.shopify.com/s/files/1/0438/6160/6550/files/31705768249.pdf
    • https://cdn.shopify.com/s/files/1/0430/6485/2634/files/sevabadedevu.pdf
    • https://static.usrfiles.com/ugd/b8c837_55bf3f6d318a4a059be0e1e5e90bd68c.pdf
    • https://static.usrfiles.com/ugd/b8c837_0191fed4c6694627b408347a747e0065.pdf
    • https://static.usrfiles.com/ugd/9904c2_ae8406645b644bfe8d281b8d34c72dc6.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4f957d428584da5bba5d44e72cf1a90.pdf
    • https://cdn.shopify.com/s/files/1/0440/2541/3782/files/entrepreneurship_development_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/2105/7700/files/80304402549.pdf
    • https://cdn.shopify.com/s/files/1/0447/9077/5965/files/ginune.pdf
    • https://cdn.shopify.com/s/files/1/0439/4660/6760/files/pdf._js_angular_2_example.pdf
    • https://cdn.shopify.com/s/files/1/0436/0945/6803/files/92147521978.pdf
    • https://cdn.shopify.com/s/files/1/0436/9124/5733/files/wonuxelanuzokokebikipobab.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_off00004e07.bin
825b9ff69903280554693fad4a14b1c9f9ab562aab5fe583483c9e35a3f9d9f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E07 5424 bytes
font_01_sfnt_off00006095.bin
f106cbd6105e2b91a51cb7b3519c7d0227f552aebfb2a5e1ac9a1c93627e82fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6095 10428 bytes

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