Malicious PDF — malware analysis report

Static analysis result for SHA-256 831bf4fb99bf6797…

MALICIOUS

PDF

40.9 KB Created: 2020-09-03 05:27:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6907ba4a9bc08ec478dfa9648fe619bb SHA-1: 296a5cf4987a0da8bb5434fd57d9e99b01e01bf8 SHA-256: 831bf4fb99bf67975c7fff64641957179225e65071b9f0be6ce7dc27a0e8d079
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to a URL that appears to be a SEO spam gateway. The document body, though heavily obfuscated, contains the same URL and references to software plugins, suggesting a lure to trick users into clicking the malicious link. The PDF also contains a large number of embedded links, indicating a link farm strategy.

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.club/wix?keyword=autotune+plugin+for+audacity+free
    • https://static.usrfiles.com/ugd/409ca8_2af334b00f3f4167bedae42f973209d3.pdf
    • https://static.usrfiles.com/ugd/2994dd_da3288daf70743d6a96554ac3d216824.pdf
    • https://static.usrfiles.com/ugd/b8c837_74e0458252074051bff3d1f92af7861c.pdf
    • https://static.usrfiles.com/ugd/01e791_727a51341a8b442ca2520547fbce6313.pdf
    • https://static.usrfiles.com/ugd/105a8c_593e969017b5416388ca3cb258f71890.pdf
    • https://static.usrfiles.com/ugd/fbccce_c2951287fabe46d6846d3848b143a4f7.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0610/files/fodijakipejidekaxav.pdf
    • https://cdn.shopify.com/s/files/1/0430/5308/8919/files/79295265209.pdf
    • https://cdn.shopify.com/s/files/1/0440/5372/5334/files/marketing_management_process.pdf
    • https://cdn.shopify.com/s/files/1/0433/7922/8833/files/3m_dental_products_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0438/2585/6669/files/15464680625.pdf
    • https://cdn.shopify.com/s/files/1/0439/9231/8110/files/42659855725.pdf
    • https://cdn.shopify.com/s/files/1/0437/7952/2722/files/83311917106.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9048/files/gobusubevajo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1206/3391/files/zebujadume.pdf
    • https://cdn.shopify.com/s/files/1/0462/8588/1505/files/the_tortilla_curtain_free_ebook.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_off00006211.bin
60fc32376235efcaeef1d2e3dca475a845454e50f1ee386eb280220d778bbb49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6211 5236 bytes
font_01_sfnt_off00007403.bin
4e47916462ef0843961f729b23b1db5aedaeac63439848a4a862867246d3d355		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7403 10152 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.