Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ea7b6d587a90b01…

MALICIOUS

PDF

49.2 KB Created: 2020-07-28 01:40:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99cb40aac2d01b713858ed8bbf928972 SHA-1: e02516431bca06836527e27a69340877558f571e SHA-256: 9ea7b6d587a90b018b15015edac9dd8c7ec30c7143debc37d89c81e7ef0c4bfa
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, with numerous external links, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The document body is heavily obfuscated, but the presence of embedded URLs and the heuristics strongly suggest a phishing or redirection attack.

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.com/pify?keyword=hacia+una+arquitectura+sostenible+pdf
    • http://files.spartanleadershipgroup.com/uploads/1/3/1/8/131856232/nifaniro.pdf
    • http://files.tristategrp.com/uploads/1/3/0/7/130739713/xumize.pdf
    • http://files.ashleyskinnertherapy.com/uploads/1/3/0/7/130738921/26d0f539f6f4.pdf
    • http://files.seacadetslc.org/uploads/1/3/0/7/130775084/4251827.pdf
    • http://files.ordanburdaninfo.com/uploads/1/3/2/6/132696104/kuferedeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/5969/1163/files/vasufam.pdf
    • https://cdn.shopify.com/s/files/1/0430/3018/4098/files/sofewalojuxom.pdf
    • https://cdn.shopify.com/s/files/1/0437/8070/2366/files/70033344982.pdf
    • https://cdn.shopify.com/s/files/1/0437/7932/6103/files/1148601909.pdf
    • https://cdn.shopify.com/s/files/1/0428/1748/7011/files/nekasubakufoni.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/78559380546.pdf
    • https://cdn.shopify.com/s/files/1/0431/4978/7285/files/gokupogekiverijovopon.pdf
    • https://cdn.shopify.com/s/files/1/0428/4180/0860/files/51847598904.pdf
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/pepajubovamime.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44329390643.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_off000080e5.bin
48e207ae2499c1bdd696c27274d909c488c81896342a657167db132c77da36b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80E5 5256 bytes
font_01_sfnt_off000092bf.bin
3d6093cbd71a2124d367c84d7ae0144b7dcc47c510699f0b56d4520994dacae2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92BF 11420 bytes

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