Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3df610d0bf5ca2f…

MALICIOUS

PDF

41.6 KB Created: 2020-10-04 20:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f09b246c885404e86351bc847c2c2584 SHA-1: 14811c38d4fb98e66f8e372e221fd6587d6caa1f SHA-256: e3df610d0bf5ca2fd14e69825d16175e45b3b33adc68eff7e09da71c60584040
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links disguised as a game walkthrough, with the primary link leading to a known malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are part of a link farm designed to obscure the final malicious destination.

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://gettraff.ru/pify?keyword=ff7+official+walkthrough+pdf
    • http://files.kiligcandleco.com/uploads/1/3/0/7/130739037/bffb2a.pdf
    • http://files.certraxapp.com/uploads/1/3/1/0/131069923/9a034a39e47.pdf
    • http://files.stmarysrcmiramichi.com/uploads/1/3/0/8/130813054/togadepesuri_rikujerusuw.pdf
    • http://files.solelysunshine.com/uploads/1/3/0/7/130739483/03108.pdf
    • http://files.fam-ilyproducts.com/uploads/1/3/1/0/131069978/414272.pdf
    • http://files.quesoslosduendes.com/uploads/1/3/1/8/131856708/96f4457.pdf
    • http://xozezoliz.massillontigerinstructionalresources.com/uploads/1/3/1/4/131412032/214f257bc620cc.pdf
    • https://site-1037230.mozfiles.com/files/1037230/24032793429.pdf
    • https://site-1037909.mozfiles.com/files/1037909/ruvefof.pdf
    • https://site-1040514.mozfiles.com/files/1040514/91178889154.pdf
    • https://uploads.strikinglycdn.com/files/aab8f824-ba8c-4a40-9f0e-3758b15eb7bc/nubewebupevebaxutif.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_off00006366.bin
b37a1199d9589aab8947838adc5efd99456b1de5f766d3c02f3771c6496f5eb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6366 5432 bytes
font_01_sfnt_off000075fa.bin
8bac45cd76a40e2ab9f8c3f931e5807062c05b458a8a8f07fd5cfb8402f66c26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75FA 10588 bytes

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