Malicious PDF — malware analysis report

Static analysis result for SHA-256 38ddfda83f1d89f2…

MALICIOUS

PDF

47.9 KB Created: 2020-08-14 10:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51ff7c2cba60cfd2c6b6cbf71d74aac6 SHA-1: 9d41fa13e20a4a14352066419ce56c241d7894b5 SHA-256: 38ddfda83f1d89f2b85920e7be352e4bd16dad3c4f4e61efde6354be9276c7d5
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links directs to a known malicious redirector at ttraff.ru, which is likely used to obscure the final malicious destination. The document body contains garbled text and a repeated URL, suggesting it is designed to appear as search results or a content aggregation page to trick users into clicking the malicious 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=windows+movie+maker+online+no
    • http://files.bearlakecounty.info/uploads/1/3/0/9/130969129/0a1d43c813008.pdf
    • http://nizidek.reneeoglesbee.com/uploads/1/3/1/1/131163635/kejuma.pdf
    • http://files.wheneverythingmatters.com/uploads/1/3/0/8/130874064/875062.pdf
    • http://files.hawaiirootsandbranches.com/uploads/1/3/0/8/130873983/1afb7a0b.pdf
    • http://files.zenparadisespa.com/uploads/1/3/0/7/130739549/majazixa-ximolimi-zimevogalufim.pdf
    • https://cdn.shopify.com/s/files/1/0431/8406/2626/files/watch_yes_man_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/3664/7317/files/rofevufivijimeta.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0810/files/pinidijata.pdf
    • https://cdn.shopify.com/s/files/1/0432/2931/5229/files/1849902495.pdf
    • https://cdn.shopify.com/s/files/1/0432/4422/4679/files/speak_english_like_an_american_vk.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/gapebajo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9645/7884/files/wuboxe.pdf
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/nokekurufapixosusunudogex.pdf
    • https://cdn.shopify.com/s/files/1/0427/7331/5740/files/9013505562.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6166/files/37776856034.pdf
    • https://cdn.shopify.com/s/files/1/0433/4728/0026/files/lirejogopive.pdf
    • https://cdn.shopify.com/s/files/1/0440/0037/9038/files/discord_server_growing.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_off00007d20.bin
40012a846c321432ba00f3cb3aa5334a3211165d5455ab986b7cc05f360013cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D20 5200 bytes
font_01_sfnt_off00008ed1.bin
30dfbab2e28c53465b7f4587e5e971bbca2d038438b7c0a3aa3c77b4e498c8f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED1 10360 bytes

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