Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b08fa60a4cd3e9a…

MALICIOUS

PDF

41.8 KB Created: 2020-10-08 19:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6bd0ed6a8fd7c7bd1dbd63db1ea34fd4 SHA-1: 627cee52573ed21528bb53d4fbf1cacb2d2b5e15 SHA-256: 3b08fa60a4cd3e9aa5f7bf5674348b72854dfecb4b3994254c4510ff5f659604
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to obscure malicious redirectors. One such redirector, https://ggtraff.ru/pify?keyword=soda+dungeon+shifter+build, is explicitly flagged as malicious. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to the malicious URL and a benign-looking PDF, suggesting a lure.

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://ggtraff.ru/pify?keyword=soda+dungeon+shifter+build In PDF document text
    • http://latiloveb.transformationalparenting.co/uploads/1/3/1/3/131382257/d0da7d03c.pdfIn PDF document text
    • http://files.andrewbattye.net/uploads/1/3/2/6/132695578/nirewu_mujive_bubugazo_birow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5667/7543/files/huffy_nel_lusso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5458/0390/files/vampire_weaknesses_pathfinder.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5740/0994/files/66697796498.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0704/9367/files/bethel_school_of_technology_cost.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/9039/6572/files/heno_de_pravia_lotion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2427/5866/files/gotofusowujakibebu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6914/7810/files/integrated_chinese_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6698/5114/files/visejufaditibafemet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/0027/4341/files/34006843788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af920164-90e2-4e69-b2fd-a6aba0371441/66150291996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/201bcf90-3baf-4aa8-9d45-aa254666a498/40408862296.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D7 5412 bytes
SHA-256: b57e6255170b89e48e4b1a4e5e311059565c50b7e404c90db197617d16c847a4
font_01_sfnt_off00007836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7836 10120 bytes
SHA-256: 47c22d64df47fb9e2e76a799e0b16525a6e0db9872b645ad1f665fa06d25ae28

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