Malicious PDF — malware analysis report

Static analysis result for SHA-256 4720680771da931d…

MALICIOUS

PDF

40.4 KB Created: 2020-08-26 11:41:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0884101c5e83e96d6e954e8768c6d6c0 SHA-1: b40727db11c6005391296d5f55eb529bda54c179 SHA-256: 4720680771da931d9427599299bac33dd8f209c7413348771243f06bd28b8ed1
152 Risk Score

Malware Insights

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

The PDF contains a prominent link disguised as a movie streaming lure, which redirects to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this redirection to a known malicious site. The ML classifier also strongly indicated maliciousness. The document body and embedded URLs suggest a phishing or scam attempt.

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=watch+major+payne+online+free+full+movie
    • http://kizoz.thorntonheathcricket.co.uk/uploads/1/3/0/7/130775162/4e4b31e053d0.pdf
    • https://cdn.shopify.com/s/files/1/0429/3771/2806/files/bible_study_plan_download.pdf
    • https://cdn.shopify.com/s/files/1/0464/6495/8616/files/fodedabek.pdf
    • https://cdn.shopify.com/s/files/1/0427/8219/5879/files/gejususevarigas.pdf
    • https://cdn.shopify.com/s/files/1/0464/7446/1352/files/82842759936.pdf
    • https://cdn.shopify.com/s/files/1/0435/8032/6051/files/nagixazejulafoxafelina.pdf
    • https://cdn.shopify.com/s/files/1/0432/5366/1851/files/wazaxibujobud.pdf
    • https://cdn.shopify.com/s/files/1/0434/2359/6693/files/xixuxiduzijurulevul.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4900/files/78796242846.pdf
    • https://cdn.shopify.com/s/files/1/0430/1442/2677/files/konuxirelevumof.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/37883739369.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_off00005e86.bin
e829610ed6c3c4837689e18c72aede1e3b7947dce3c01b08817401dc7075fe29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E86 5328 bytes
font_01_sfnt_off00007099.bin
a330511c7c7ba5b16fcb9421d2058c0a8b027b17db98e104dad04f62b5754f5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7099 10652 bytes

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