Malicious PDF — malware analysis report

Static analysis result for SHA-256 78096121ac038fbc…

MALICIOUS

PDF

57.9 KB Created: 2020-08-29 11:30:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3c86dabdf5be866470300adc8f7639a SHA-1: 80c4915a637dc8241d016ecd7350a828391ff569 SHA-256: 78096121ac038fbc45a9a40ec44910758196c0fd012fe60edf9582671d12407c
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to contain the same malicious URL. The presence of a link farm and a malicious redirector suggests an attempt to drive traffic to malicious infrastructure, likely for phishing or malware distribution.

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/wix?keyword=peliculas+de+cantinflas+online+latino
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/diagramme_de_phase_de_l_eau.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gomejalubewetilukifij.pdf
    • https://cdn.shopify.com/s/files/1/0434/8765/8141/files/3773991864.pdf
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/fawasaxijutapaxogixenewoj.pdf
    • https://static.usrfiles.com/ugd/067ecb_c4ec0fec8bea44baac8ff2b727b90224.pdf
    • https://static.usrfiles.com/ugd/b8c837_2bc9f02fb3f44690aa5f951b8747ba9e.pdf
    • https://static.usrfiles.com/ugd/b8c837_2feb2f00adbc4d52b2ca40b7817f0849.pdf
    • https://static.usrfiles.com/ugd/b8c837_9efea030c12f4ddcbf79c469a37b49f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_74fc5a1685cb45c594a89ea55cf96e93.pdf
    • https://static.usrfiles.com/ugd/b8c837_50c2136ffa7a4ac988b5cd84905a140d.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_off0000a6b3.bin
da4235f8fa043db3580eee19ef9217e13b76e0f59756426bd593be5e065b6485		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6B3 4920 bytes
font_01_sfnt_off0000b77a.bin
dedf9b480dc8d643a1c87d0985678f31b8d25dfbbb443f88e12a4c1e1da4330e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB77A 10404 bytes

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