Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e80aa6fe27f0f8f…

MALICIOUS

PDF

36.8 KB Created: 2020-08-24 15:56:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6dab8c30d786df1d9eef4b5ca362ec20 SHA-1: af7592faec46f896baedc03cac10f5f8bfe23fc2 SHA-256: 6e80aa6fe27f0f8f04a37ba09ef4782257b2866eaf6a4bb325b622883d02c24f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The document appears to be a link farm designed to manipulate search engine results or redirect users to malicious content.

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.ru/pify?keyword=automatic+control+systems+raven+pdf
    • http://files.bookcellarlwonline.com/uploads/1/3/1/8/131860787/xejapami.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8257/9110/files/wufuka.pdf
    • https://cdn.shopify.com/s/files/1/0431/6725/2641/files/72882809823.pdf
    • https://cdn.shopify.com/s/files/1/0435/3772/7637/files/40546347620.pdf
    • https://cdn.shopify.com/s/files/1/0438/6937/2576/files/56053875504.pdf
    • https://cdn.shopify.com/s/files/1/0433/8312/8214/files/23013541051.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3250/files/duzen.pdf
    • https://cdn.shopify.com/s/files/1/0436/9825/8088/files/simple_consulting_agreement_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/5823/3493/files/html_css_free_website_templates.pdf
    • https://cdn.shopify.com/s/files/1/0432/0726/2367/files/tomb_of_annihilation_backgrounds.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/42179594745.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_off00004d4b.bin
17515b247e3450e7274b34650508ebb7309cc74f928f22b94296c377121ee850		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D4B 5452 bytes
font_01_sfnt_off00005fc9.bin
f8779d89ae2b48150488adc7f1817b827b30bb11fa6af179ba899b1dd6ef1874		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC9 12240 bytes

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