Malicious PDF — malware analysis report

Static analysis result for SHA-256 80204251317235d8…

MALICIOUS

PDF

88.6 KB Created: 2020-08-16 00:52:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6e168b16d19acd7a197e99fb72337a5 SHA-1: 410d46dfaae97109d5d4c043b75006394c6e9eda SHA-256: 80204251317235d81ceaff982d58e3214eb77775e3d4a318c7224486ce559d47
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to drivers and a URL that matches the redirector. The PDF_SEO_LINK_FARM heuristic also indicates a large number of external links, suggesting a link farm for SEO manipulation or to host further malicious content. No scripts were extracted, but the presence of malicious links is sufficient evidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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 https://ttraff.com/pify?keyword=amd+ati+radeon+hd+4200+drivers
    • http://razadufup.natalia-theodoridou.com/uploads/1/3/2/7/132740449/619078.pdf
    • http://files.tweetyjill.com/uploads/1/3/0/9/130969659/xiziva_xegatigewem_sabew_mivunigusom.pdf
    • http://files.aidsministries.org/uploads/1/3/1/0/131069934/f9ed1a28.pdf
    • http://files.jacks-cottage.co.uk/uploads/1/3/0/7/130738513/fajebilijim-dotamawelituviz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/0440/9494/files/cartina_geografica_trentino_alto_adige.pdf
    • https://cdn.shopify.com/s/files/1/0430/6970/2306/files/dugoguxufuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/4986/8712/files/vepixovaporalodowilujojok.pdf
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/pals_manual_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4705/0661/files/23614119606.pdf
    • https://cdn.shopify.com/s/files/1/0434/4106/2040/files/sixuviwekuwune.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1906/files/halo_3_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/1019/5605/files/photo_editor_blur_background_app_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0439/4962/1406/files/25156749023.pdf
    • https://cdn.shopify.com/s/files/1/0428/5959/3894/files/archicad_free_autodesk.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_off00010ff3.bin
8b4c8f63605675832d45a2cec0de90b985c6c2c287dc40d27a78909d093bf6d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF3 5444 bytes
font_01_sfnt_off0001224f.bin
8a0a0f6c9d044f28dccb7074da707e72f84b8b0c61ff5aeb353b874126cc2111		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1224F 16244 bytes

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