Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e452a6c75c3483e…

MALICIOUS

PDF

49.7 KB Created: 2020-09-14 00:38:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ffe081c69e0a5939cee7e936a6a0edd SHA-1: 30173deb377aa62610ec21e2ebaf8e4b8a2b1579 SHA-256: 6e452a6c75c3483ec87d4d6331bf60944baaefcef7f68f0876a997e6ccaa609f
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm. One prominent URL, 'https://ttraff.me/wix?keyword=world+of+warships+phoenix+guide', is flagged as a malicious redirector, indicating a phishing or malware distribution attempt. The document body, though partially corrupted, contains references to this malicious URL and other PDF links, reinforcing the lure strategy.

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.me/wix?keyword=world+of+warships+phoenix+guide
    • http://files.westcoastminitruckers.com/uploads/1/3/0/7/130739750/zowezabokopomad.pdf
    • http://tunudew.iscebs-richmond.org/uploads/1/3/1/4/131437508/kumubofidusu.pdf
    • http://files.finneganswakeupwithcandle.com/uploads/1/3/1/8/131871467/newojelovu.pdf
    • http://files.neciasnotables.com/uploads/1/3/2/6/132682768/4749671.pdf
    • http://files.tamsweets.com/uploads/1/3/1/0/131070113/649a4164b1651.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0313/4627/files/34400038418.pdf
    • https://cdn.shopify.com/s/files/1/0432/8590/5576/files/teoria_del_delito_causalista_finalista_y_funcionalista.pdf
    • https://cdn.shopify.com/s/files/1/0436/0939/1261/files/mizupasanisuzasadagapugal.pdf
    • https://cdn.shopify.com/s/files/1/0435/1311/8872/files/61871666411.pdf
    • https://cdn.shopify.com/s/files/1/0438/4158/5314/files/39942335385.pdf
    • https://static.usrfiles.com/ugd/7dfe85_64b4a08c319d4cb0965c6ef296370d70.pdf
    • https://static.usrfiles.com/ugd/d54300_8f64d05b11e14ac9bf58b45dd52f82f3.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_off00006ef0.bin
a146a4ac271d97e2e082c625be093d2738e85786a4202e196da902b48ce1229a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF0 5476 bytes
font_01_sfnt_off000081ac.bin
7c75362a2499b0152d66a31d7465f23f0e45aa01aba65c6055a306a8b0d917db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81AC 10280 bytes
font_02_sfnt_off0000a4d3.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4D3 16092 bytes

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