Malicious PDF — malware analysis report

Static analysis result for SHA-256 399312402d525925…

MALICIOUS

PDF

43.3 KB Created: 2020-09-17 02:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf5f9a5af37c73cf3759a05843c5498c SHA-1: 9fe768e8f31fa95b66b6944ec4c420cec2683fb6 SHA-256: 399312402d5259258ac772e832a3cc06f157235c8128edb283aeb9be4c7a4660
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body also explicitly contains the URL 'https://ttraff.link/wix?keyword=8th+grade+spelling+bee+words+2018-19', which is a known malicious redirector. Another critical heuristic indicates a PDF link farm, with URLs like 'http://files.west150nyc.com/uploads/1/3/1/4/131406606/4e451.pdf' being present.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.link/wix?keyword=8th+grade+spelling+bee+words+2018-19
    • http://files.west150nyc.com/uploads/1/3/1/4/131406606/4e451.pdf
    • http://pivovu.gordonstounartandphotography.com/uploads/1/3/0/7/130738948/mowazeworat.pdf
    • http://files.centralcrossingchoirs.org/uploads/1/3/0/7/130739559/xiwuzogupozeneforu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/meaning_and_definition_of_business_environment.pdf
    • https://cdn.shopify.com/s/files/1/0430/0508/3811/files/36358148081.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34007074416.pdf
    • https://cdn.shopify.com/s/files/1/0435/0525/4566/files/twenty_lessons_in_environmental_sociology_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/6345/8457/files/36278406596.pdf
    • https://cdn.shopify.com/s/files/1/0434/2402/2677/files/zekorerute.pdf
    • https://cdn.shopify.com/s/files/1/0430/3182/2485/files/nivabax.pdf
    • https://cdn.shopify.com/s/files/1/0427/9376/2975/files/divinity_original_sin_enhanced_edition_ps4_guide.pdf
    • https://c681ff29-4a84-4567-8509-a46f76abdbd7.filesusr.com/ugd/6cf0f5_0b6ebcfb93684ad38d91b2d8c9428ab0.pdf?index=true
    • https://6b99d117-a162-4c0d-a1e3-b440802e931f.filesusr.com/ugd/140efa_a2da69980f5d4ee49d8cdd954e70103f.pdf?index=true
    • https://2c5a874f-9678-4b87-8563-e10ededfe2d6.filesusr.com/ugd/6cf0f5_272cf80f6ffb41dca68707af05dbc473.pdf?index=true
    • https://18ca0066-5f51-4526-9998-73ed84daf908.filesusr.com/ugd/4dded2_7700e095bc0a43b1915cee6eb550e5a1.pdf?index=true
    • 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_off000067a6.bin
651d9347d2557a6e0d0e63f8a7eec4d517d47a98da5b1743f190eb24bb766f78
pdf-font-stream PDF embedded font (sfnt) at offset 0x67A6 6064 bytes
font_01_sfnt_off00007c4e.bin
6345db295065a5bf1c16b0021ebae062aee0bcea951b6e9e91b6cd93f764eabc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4E 10500 bytes