Malicious PDF — malware analysis report

Static analysis result for SHA-256 84896ad35ffbf918…

MALICIOUS

PDF

41.3 KB Created: 2020-08-24 21:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e39199b716ebc7b6bb5557b4018d77ec SHA-1: d18c767a54f31424a2de47c0d698279a86139f0f SHA-256: 84896ad35ffbf918f6986ca1116a75ad8b64aded69c17d39c162c28dc46d9483
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, characteristic of a link farm designed to distribute traffic or host malicious content. One of these links, 'https://ttraff.ru/pify?keyword=i+am+so+lonely+song++hd', is identified as a known malicious redirector. The presence of this malicious link and the overall structure suggest an attempt to lure users 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/pify?keyword=i+am+so+lonely+song++hd
    • http://files.herewoodsart.co.uk/uploads/1/3/2/6/132681045/xomikuf.pdf
    • http://files.anclotedesign.com/uploads/1/3/1/3/131398452/4940953.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/6842/2309/files/analytical_methods_in_vibrations_leonard_meirovitch.pdf
    • https://cdn.shopify.com/s/files/1/0461/9852/2014/files/puditexemizalojewetet.pdf
    • https://cdn.shopify.com/s/files/1/0457/8630/0572/files/3592242651.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/kitoj.pdf
    • https://cdn.shopify.com/s/files/1/0440/1112/6942/files/51188065844.pdf
    • https://cdn.shopify.com/s/files/1/0436/0349/3022/files/xoninijo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9532/6887/files/91541261525.pdf
    • https://cdn.shopify.com/s/files/1/0431/1564/3031/files/wawoxufukufufalufed.pdf
    • https://cdn.shopify.com/s/files/1/0428/0428/1511/files/banana_plant_information_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7451/8180/files/sitikebasezugobumo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7089/7824/files/divinity_original_sin_ps4_strategy_guide.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004600.bin
35cf326b5ca8201f139db15b8013267d3d78ff6890359c2f8742757bf498d502		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4600 5184 bytes
font_01_sfnt_off0000577a.bin
ac1801524b1b2d219dafc9abd6a4afd9e0d1ff24d6e80a5dd7be7a16a973e293		 pdf-font-stream PDF embedded font (sfnt) at offset 0x577A 9596 bytes
font_02_sfnt_off000078b5.bin
e58e8e8d3617fa2f52d62469859eb662c26c1c1537dc21f5cc6f1aa71eaa6aed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78B5 18776 bytes

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