Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a0fce03a7cfaf4…

MALICIOUS

PDF

45.4 KB Created: 2020-09-18 17:12:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24dc8b7cdd6789d214d7fd6779fbe029 SHA-1: 763861a59671820856da14e842b1c9860a5418fe SHA-256: 09a0fce03a7cfaf43c93a8ae3dcc530100356a46a02e4ad0a7d6e788e4aa7657
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/wix?keyword=computer+science+circles+answers+6', which is likely intended to lure the user to a malicious site. The presence of numerous links suggests an attempt at SEO manipulation or a phishing campaign, leading to the classification as Spearphishing Attachment.

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.club/wix?keyword=computer+science+circles+answers+6
    • http://files.wemplephoto.com/uploads/1/3/1/4/131454620/0e2ce5e8.pdf
    • http://fefodazo.meadowsoflaurelwood.com/uploads/1/3/2/7/132740720/virulivevinobedirix.pdf
    • http://filekek.thefulfillmenthouse.com/uploads/1/3/2/6/132682076/442825.pdf
    • http://files.theshopservice.com/uploads/1/3/1/6/131606121/8d32626afe8e1d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://481238ce-c77d-4e45-ac14-42c0eb35a399.filesusr.com/ugd/278743_f5f019b4403e4e0684886e886db5abbf.pdf?index=true
    • https://aa9d992c-faaf-4514-a1d8-e53b1af88bc2.filesusr.com/ugd/1a1092_3ec5da883360490bbb3d67da527b76ec.pdf?index=true
    • https://725234cb-6d7b-4261-adfe-1df86ce0e32a.filesusr.com/ugd/4cf28d_066aa9eee31d430a9bf88a2171fc38d6.pdf?index=true
    • https://460562f2-ea27-4fe9-8459-a59825b52fd2.filesusr.com/ugd/e54fc7_43db710544784f939236f07b0583d691.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0429/3387/8940/files/22978519360.pdf
    • https://cdn.shopify.com/s/files/1/0434/4017/7314/files/alimentacion_complementaria_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4155504299.pdf
    • https://cdn.shopify.com/s/files/1/0437/7398/4919/files/niv_study_bible_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000623a.bin
8bb42f308661669073c8ee3eb88825a85291b8b42d728bda9c17eec4fd091e27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x623A 5232 bytes
font_01_sfnt_off000073ff.bin
52eb321c87bedf7924a368064e85256396fad796de4745af69aba479febaae4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73FF 11260 bytes
font_02_sfnt_off00009a80.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A80 4324 bytes

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