Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ecfe2eb7dda6da3…

MALICIOUS

PDF

33.2 KB Created: 2020-09-07 00:01:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99b10b91595cfbffe57db694766654d2 SHA-1: 967ef4a9ed8cd862b42835a07d37d7cdc31f446f SHA-256: 7ecfe2eb7dda6da3c2f6e45c684319afe80c7d1eb1d89f56a2d1711e7d0bfba3
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at `https://ttraff.me/wix?keyword=dogfish+shark+dissection+answers`. The document body, though partially corrupted, contains text related to 'dogfish shark dissection answers', suggesting a lure to trick users into clicking the malicious link. The presence of a large number of external PDF links, many hosted on `cdn.shopify.com`, indicates a link farm strategy, likely to improve search engine ranking for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.me/wix?keyword=dogfish+shark+dissection+answers
    • https://cdn.shopify.com/s/files/1/0428/3881/8982/files/wubaxabarafe.pdf
    • https://cdn.shopify.com/s/files/1/0427/7259/4844/files/cymera_apk_for_android_2._3.pdf
    • https://cdn.shopify.com/s/files/1/0431/7108/6485/files/51719667176.pdf
    • https://cdn.shopify.com/s/files/1/0428/5241/7703/files/worido.pdf
    • https://cdn.shopify.com/s/files/1/0460/3310/9156/files/ti_minecraft_apk_vn.pdf
    • https://cdn.shopify.com/s/files/1/0430/8225/2442/files/79862967582.pdf
    • https://cdn.shopify.com/s/files/1/0431/6613/8522/files/zotizokipogigubivopoxib.pdf
    • https://cdn.shopify.com/s/files/1/0434/2841/3607/files/61257740394.pdf
    • https://cdn.shopify.com/s/files/1/0429/1536/5020/files/fepenuzi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0076/5336/files/pivunuduluv.pdf
    • https://cdn.shopify.com/s/files/1/0462/7936/0661/files/basic_speaking_english.pdf
    • https://cdn.shopify.com/s/files/1/0430/8949/4177/files/61233708731.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_off0000439b.bin
07aa5deb41ed6a8ce6b44002ba071325065500c56f7d9f58c7b362f06ed5e882		 pdf-font-stream PDF embedded font (sfnt) at offset 0x439B 5408 bytes
font_01_sfnt_off0000561c.bin
eb6de9e3adf2daf797bb68c7825c5503e3b22e4b069175d3b0960a18003837cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x561C 9964 bytes

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