Malicious PDF — malware analysis report

Static analysis result for SHA-256 78a6d617674fe016…

MALICIOUS

PDF

63.8 KB Created: 2020-08-14 15:59:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e232649bde7944ce28afe13d063d8ef SHA-1: 71ac017b102f761d649029b91d28abd422178730 SHA-256: 78a6d617674fe01600f941de52a984c0eb2ff9b26b86041f59422662f3b5564e
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a link farm, suggesting an attempt to distribute or obscure malicious URLs. While no scripts were directly extracted, the PDF structure and the presence of embedded URLs indicate a malicious intent to lure users to external, potentially harmful, 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.cc/pify?keyword=dna+worksheet+biology+answers
    • http://files.aprilfricke.com/uploads/1/3/1/6/131606069/vakerituru.pdf
    • http://nekezene.mtoliveameslidell.org/uploads/1/3/2/7/132712116/topagegofag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2750/4031/files/49890557616.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/bill_of_sale_georgia.pdf
    • https://cdn.shopify.com/s/files/1/0433/2634/1272/files/10127219733.pdf
    • https://cdn.shopify.com/s/files/1/0432/4691/1643/files/74374497331.pdf
    • https://cdn.shopify.com/s/files/1/0440/6480/0918/files/the_catechism_of_the_council_of_trent.pdf
    • https://cdn.shopify.com/s/files/1/0448/2033/2705/files/non_broadcast_media_in_education.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7796/files/51502733886.pdf
    • https://cdn.shopify.com/s/files/1/0433/9109/0844/files/dipifusala.pdf
    • https://cdn.shopify.com/s/files/1/0439/8533/8526/files/stop_creative_cloud_startup_mac.pdf
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/98074715217.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31906594002.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a37.bin
a6e932b369427376f0dbc52bf203135fad5f1cbb610b38d8fba3d6486cb5bea6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A37 11240 bytes
font_01_sfnt_off00009ef3.bin
e1a1e222d8fe9a70f22868af39ef5d59e6c0e228449e62b82332c8f4521fcad9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EF3 5344 bytes
font_02_sfnt_off0000b137.bin
1a1494f25395c04707c5ce0d70edbadce78555f25c90a7f0195d3e87fedecb11		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB137 13744 bytes
font_03_sfnt_off0000dcae.bin
80d2ed10de9a77d63fcaf13db49404aea5d683d966c3f0754844067aaad49f8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAE 16080 bytes

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