Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cf99387308b0514…

MALICIOUS

PDF

40.8 KB Created: 2020-08-22 12:56:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb878181bf9c734d0a2358f4b332ee78 SHA-1: 862b83180fa744409eb561c35ab89b0338cab376 SHA-256: 6cf99387308b0514dd6f50433ee68c05c4edd00f75467adcda3729f793c75415
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector at `ttraff.com`. The document body, though heavily obfuscated, contains text related to 'Coreldraw visiting card templates free' and references the wkhtmltopdf tool, suggesting a lure to disguise malicious links. The presence of many external PDF links indicates a link farm strategy, likely to distribute malware or conduct phishing.

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=coreldraw+visiting+card+templates+free
    • http://zonedix.mamawellacu.com/uploads/1/3/1/4/131407233/vevegikapizix-wiwoxirowoneg.pdf
    • http://jorejonu.whiteroseultra.co.uk/uploads/1/3/2/3/132302936/5e4839c.pdf
    • http://files.melissatisonart.com/uploads/1/3/1/4/131453817/pedugutotavom_niguru.pdf
    • http://nosipa.johnsaponaro.com/uploads/1/3/2/6/132696067/fegixujad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9419/5870/files/dativerepaloguje.pdf
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/4309245515.pdf
    • https://cdn.shopify.com/s/files/1/0447/8402/5751/files/digital_computer_electronics_book.pdf
    • https://cdn.shopify.com/s/files/1/0439/9860/9566/files/81093058438.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nebedaxogatasimilore.pdf
    • https://cdn.shopify.com/s/files/1/0431/1855/9389/files/nevaro.pdf
    • https://cdn.shopify.com/s/files/1/0431/6374/6453/files/coles_mastercard_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/1742/1479/files/58021925546.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/numaxeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/1368/4891/files/zulujuxideluwakepu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9711/2219/files/nadugopizababoxofut.pdf
    • https://cdn.shopify.com/s/files/1/0433/5858/4986/files/how_to_center_text_in_latex.pdf
    • https://cdn.shopify.com/s/files/1/0437/6097/6021/files/surface_area_of_a_pyramid_net_worksheet.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_off000060b2.bin
5ecbf33a0a4cd8dac2bc1ab5b936c3cb730dc89d6c2654440db12056bfadee54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60B2 5532 bytes
font_01_sfnt_off0000738d.bin
3bd94f131a38b3cc8a1c0a52eb67dcdb5fed8abe8ea7aace4b813266e2c52ab3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x738D 10076 bytes

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