Malicious PDF — malware analysis report

Static analysis result for SHA-256 74423ece0f2e6a3e…

MALICIOUS

PDF

51.0 KB Created: 2020-07-31 10:54:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b290600e71a25c6a372080caa75fc9e5 SHA-1: a02bddb9c691d4c1d860e3e4706658824f3d141c SHA-256: 74423ece0f2e6a3e1a7398c401342f92da20ed064ad4d9fe71b0c50f200fb4c8
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'drone aerodynamics pdf'. The presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to drive traffic to malicious sites or host phishing content.

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=drone+aerodynamics+pdf
    • http://files.ronnieroseband.com/uploads/1/3/0/8/130813797/a7f99.pdf
    • http://files.whatsjordaneaton.com/uploads/1/3/1/4/131410158/9f5b0bed404f6c.pdf
    • http://files.rocio-madera.com/uploads/1/3/1/0/131071063/lojevomig-miwanizu-jozixidobo-gigizoko.pdf
    • http://files.newholocaustliterature.com/uploads/1/3/2/7/132740339/jidakonizawofuboxuzo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9203/4211/files/lidevoruruduzilofajob.pdf
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/vugosogujonoxedo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/3270796036.pdf
    • https://cdn.shopify.com/s/files/1/0434/4958/1724/files/21651392838.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/6288308662.pdf
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/12825080667.pdf
    • https://cdn.shopify.com/s/files/1/0433/3345/1926/files/xetofokofirejijinupifa.pdf
    • https://cdn.shopify.com/s/files/1/0435/0869/5192/files/tawemimipefeperilane.pdf
    • https://cdn.shopify.com/s/files/1/0435/5512/7459/files/zajakepepolebubuwer.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99781003244.pdf
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/votivonazotuxibolodumexeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vofekofunore.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/tidifawolizizorimimikit.pdf
    • https://cdn.shopify.com/s/files/1/0434/6734/1974/files/saletago.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_off00008a13.bin
c72eb85ca1e9cc3e262e0543f195818aaa1f415302e34cc82cfab72213cd03b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A13 5080 bytes
font_01_sfnt_off00009b46.bin
cb58759ace65a6a3c8be4cc9d59afd2a556f4ae6b7a96514da74054d83cdafb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B46 10340 bytes

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