Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a79419957ee26a…

MALICIOUS

PDF

51.4 KB Created: 2020-07-13 00:05:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c06f9dfc442d409e920c1ba1c386f394 SHA-1: 8191de7981b6be96ae6de2ecce51cd0b2bb843bc SHA-256: 02a79419957ee26a771730914c644758efbcc65e16437198d46dcbc724c396ea
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 suspicious domains and are flagged as part of a link farm. One critical heuristic indicates that a link redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains keywords related to the links, suggesting an attempt to disguise the malicious nature of the content. No scripts were extracted, but the primary attack vector appears to be directing users to malicious websites.

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.com/pify?keyword=military+working+dog+crates
    • http://files.atlancomarketinggroup.com/uploads/1/3/1/4/131437766/kirufezidi.pdf
    • http://files.artlynchactingcoach.com/uploads/1/3/1/3/131380868/tagaxe.pdf
    • http://files.gamcbd.com/uploads/1/3/0/8/130813063/rovoduxedoxozo_verogen_kepidofis_mexeneniratato.pdf
    • http://files.equusourique.com/uploads/1/3/2/6/132682892/sexukowedup.pdf
    • http://files.savethatdog.com/uploads/1/3/0/7/130739099/4209786.pdf
    • http://files.loribeliharboyd.com/uploads/1/3/1/1/131164039/nepivulewozuju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://xefipun.files.wordpress.com/2020/06/73578658464.pdf
    • https://dujafuxipad642303133.files.wordpress.com/2020/07/76620894177.pdf
    • https://mojizidiz.files.wordpress.com/2020/07/limojefubuka.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20659662050.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98908457197.pdf
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/sojujuzulijunubividasom.pdf
    • https://cdn.shopify.com/s/files/1/0432/8570/8968/files/buvowotiragafanodovet.pdf
    • https://cdn.shopify.com/s/files/1/0435/3949/7112/files/zopeperojakiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/6288/5541/files/77961887712.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/xojevivotufozej.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_off00007092.bin
8391203d5ad5ab5f687db8651ca2db6522e5c47d3a8f510ac84321273be6cd85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7092 5160 bytes
font_01_sfnt_off0000823e.bin
d3d204282d935418a3d3cc087a6251f9210421beb6cdc19b2e9405e18bf5d63a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x823E 10216 bytes
font_02_sfnt_off0000a584.bin
782f9dd58c8d3a5dee4762fd2432065882cc38f011620ff24880c098294cf74a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA584 17696 bytes

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