Malicious PDF — malware analysis report

Static analysis result for SHA-256 5412d4511c086706…

MALICIOUS

PDF

47.3 KB Created: 2020-09-11 00:10:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a44db630d504d1413dff69cb6dd93088 SHA-1: 953537b12821450fb7a463826632d57da8e630ac SHA-256: 5412d4511c0867065f116cbc33b3427b0719821f74ca8d25f40b7754949f092a
150 Risk Score

Malware Insights

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

The PDF file contains a high number of embedded links, many of which point to external websites. One critical heuristic identified a link to known malicious redirector infrastructure, specifically `https://ttraff.club/wix?keyword=artritis+reumatoide+deformante+degenerativa`. Another heuristic flagged the document as a PDF link farm, with numerous links to PDF files hosted on various domains. The ML classifier also strongly indicated maliciousness. These factors suggest the document's primary purpose is to redirect users to potentially harmful 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.club/wix?keyword=artritis+reumatoide+deformante+degenerativa
    • http://fejom.unknowngeniuses.com/uploads/1/3/0/8/130813136/puzujazigozez_ketogofikovoz_fuxikagusikewuj_pevow.pdf
    • http://files.terwilligercpa.com/uploads/1/3/1/4/131453969/lilebopegizul.pdf
    • http://files.dibbacityguide.com/uploads/1/3/1/3/131380308/3151204.pdf
    • https://cdn.shopify.com/s/files/1/0430/1750/2869/files/10172571358.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/bristol_university_campus_map.pdf
    • https://cdn.shopify.com/s/files/1/0436/8846/0441/files/1405963695.pdf
    • https://cdn.shopify.com/s/files/1/0434/6091/9461/files/igor_bergler_biblia_pierduta_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/9635/0626/files/skykiwi_rent_house.pdf
    • https://cdn.shopify.com/s/files/1/0431/5922/4480/files/pagawexufiteko.pdf
    • https://cdn.shopify.com/s/files/1/0434/8916/5478/files/personal_blog_website_templates.pdf
    • https://static.usrfiles.com/ugd/48f461_dfeb4e96e1d24e179fa82bdce316a000.pdf
    • https://static.usrfiles.com/ugd/c7a620_7c3f295e9a4c4c0fa4472ee6faf34a13.pdf
    • https://static.usrfiles.com/ugd/bcfc12_1509d2eeec854cdebb02328103c462e2.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_off00007bdf.bin
6502bc1d3d9b59f7ce905481d96b5c58b962b349ddd25dbb6511b54d3a81edd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BDF 5244 bytes
font_01_sfnt_off00008da7.bin
7ca4804c79b8d17533a510bd3ed298aef44b9ba21bda6bb34aa5ce69d90ac5be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA7 10156 bytes

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