Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ed5480ebc30197e…

MALICIOUS

PDF

49.3 KB Created: 2020-07-18 19:04:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c3442fc7f74c37de3cd701f94470ca4 SHA-1: a27d18e75015adf0feb3df942ef3993527898539 SHA-256: 6ed5480ebc30197ec260c1c402bb31010fb549be7245da4e901da611d408df74
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. This indicates an attempt to lure users to malicious infrastructure. The PDF also contains a large number of external links, suggesting a link farm or SEO poisoning tactic. While no scripts were extracted, the presence of a malicious redirector and the nature of the embedded link suggest a phishing or redirection attack.

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.cc/wb?keyword=anticorpi%20monoclonali%20in%20oncologia%20pdf
    • http://files.essentialdance.co.uk/uploads/1/3/1/4/131454950/8615878.pdf
    • http://files.twisterchasers.com/uploads/1/3/1/3/131398010/3b160c.pdf
    • http://files.stephaniesmithshowdogleads.com/uploads/1/3/1/6/131606349/008a386e8fa8be.pdf
    • http://files.acromios.eu/uploads/1/3/1/8/131872032/a7f6ac.pdf
    • http://files.rodneyhartman.com/uploads/1/3/1/4/131437107/nawufefi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/rerawedi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9506/4733/files/16798295868.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0309/files/41750468304.pdf
    • https://cdn.shopify.com/s/files/1/0430/0177/4233/files/rafux.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voxetevew.pdf
    • https://medidiri.files.wordpress.com/2020/07/69694124406.pdf
    • https://bewisati.files.wordpress.com/2020/06/27056281600.pdf
    • https://jiwawivop.files.wordpress.com/2020/06/96809574500.pdf
    • https://jevezuvexog.files.wordpress.com/2020/07/piforug.pdf
    • https://cdn.shopify.com/s/files/1/0428/9137/8854/files/40794755426.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/rerexufaroruzotus.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/ferakozapitezederif.pdf
    • https://cdn.shopify.com/s/files/1/0430/1137/5267/files/12090497955.pdf
    • https://cdn.shopify.com/s/files/1/0432/3760/5544/files/26488870828.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16175378270.pdf
    • https://cdn.shopify.com/s/files/1/0429/3882/6918/files/kilisigobazidijarova.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_off000082bc.bin
85d246d866a17168e562f3dab0fbf6e20a50051eada9d4a5a44330520e471309		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82BC 4956 bytes
font_01_sfnt_off00009369.bin
b5a219faf541ab6c1aaedbe97706a4052d773b1177d7158c90b2777216df22c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9369 11164 bytes

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