Malicious PDF — malware analysis report

Static analysis result for SHA-256 039db6061c48c476…

MALICIOUS

PDF

35.1 KB Created: 2020-08-11 03:09:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37fafaae62c9549d29f8cc3a3e72b79f SHA-1: b64de8600973c96aa44679f1e13b802673cd2f89 SHA-256: 039db6061c48c476481e645f38d42d0caf51fff18a8d96ba76fa9e210a2ed8a9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to PDF files hosted on external domains, which is indicative of a link farm or SEO spam. One URL, 'https://ttraff.ru/wb?keyword=faultlines%20debating%20the%20issues%20in%20american%20politics%20', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the structure suggests a malicious document intended to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 http://files.sweetwaterpe.org/uploads/1/3/1/4/131407692/dobaferadu.pdf
    • http://doxogole.nwbars.com/uploads/1/3/0/9/130969723/futegijitekited_demukosag.pdf
    • http://files.larchiduc.com/uploads/1/3/2/7/132741241/537707.pdf
    • http://files.arm-group-llc.com/uploads/1/3/1/6/131606890/bozokigotupamez-mebibujupuk-vewowaraxelagap-tazinofalis.pdf
    • https://ttraff.ru/wb?keyword=faultlines%20debating%20the%20issues%20in%20american%20politics%20
    • https://ttraff.ru/wb?keyword=faultlines%20debating%20the%20issues%20in%20american%20politics%20(fifth%20edition
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/0741/6219/files/proyecto_de_grado_umsa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8070/4405/files/xatofet.pdf
    • https://cdn.shopify.com/s/files/1/0428/1024/5279/files/lockheed_martin_mission_statement.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/66094384011.pdf
    • https://cdn.shopify.com/s/files/1/0427/9818/6652/files/dafepowa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/70034698055.pdf
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/7604474115.pdf
    • https://cdn.shopify.com/s/files/1/0437/6982/3390/files/30566984684.pdf
    • https://cdn.shopify.com/s/files/1/0430/8546/3713/files/horizontal_and_vertical_axis_wind_turbines.pdf
    • https://cdn.shopify.com/s/files/1/0434/8870/6717/files/voxine.pdf
    • https://cdn.shopify.com/s/files/1/0436/2207/2480/files/bullying_acoso_escolar_rosa_serrate_gratis.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049a4.bin
4a4e9f0ba3139410553215bfce36ead778753b8387206b742c388565ffd50a2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49A4 5820 bytes
font_01_sfnt_off00005d45.bin
39bb8385d756894f41e70bafcb3ebde65ef27a687766052ade4654a0f8e8d8f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D45 9844 bytes

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