Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ddd56bd0088948e…

MALICIOUS

PDF

41.5 KB Created: 2020-09-10 16:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38f5945d381d2ad61974c9927fb9b698 SHA-1: eefa1477f8518814cc28c015b016caf81bc314c1 SHA-256: 7ddd56bd0088948eb315112b3d5e0bb9c9516615b6d2dfb9c3a275727d295077
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector at `https://ttraff.club/wix?keyword=loan+amortization+table+template`. This suggests the document is part of a link farm designed to distribute malicious content, likely through a phishing or social engineering lure. The ML classifier also strongly indicated maliciousness.

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.club/wix?keyword=loan+amortization+table+template
    • http://files.tiered-educational-consulting.com/uploads/1/3/0/9/130969893/zurarozexanotijerax.pdf
    • http://maxazoj.makeupbysarahe.com/uploads/1/3/1/1/131164250/gesuleninom.pdf
    • http://files.coffsharbourroofing.com/uploads/1/3/1/3/131398605/3727926.pdf
    • http://zonato.riversidecarriagecompany.com/uploads/1/3/1/4/131453648/lidaxeveleb.pdf
    • http://tegopem.grangerlandrfd.com/uploads/1/3/2/7/132741100/43a2b5bff.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7179/0494/files/rikumajatipibejed.pdf
    • https://cdn.shopify.com/s/files/1/0440/1725/4558/files/netter_anatomy_coloring_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/4908/2264/files/juxanoxuf.pdf
    • https://cdn.shopify.com/s/files/1/0437/7231/3751/files/fuvebojaganovigogaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/bobegabeluvosuvowupaxikuw.pdf
    • https://static.usrfiles.com/ugd/90661f_22c292e8735641b7a1edaab9f215a200.pdf
    • https://static.usrfiles.com/ugd/4dd980_62ceb5cca600496e840f4a2d0f086971.pdf
    • https://static.usrfiles.com/ugd/3c9ac1_2dec7a5e266c465287819f98a29f6be4.pdf
    • https://static.usrfiles.com/ugd/191a6d_85a9fed8785b47229c058207e974b871.pdf
    • https://static.usrfiles.com/ugd/338562_3630e54ef82c4f0da75a87536d557d3c.pdf
    • https://static.usrfiles.com/ugd/98d639_dc8feaf8a6884304b124889cf26323a0.pdf
    • https://static.usrfiles.com/ugd/8cbfce_169b98c57c0842d9b6864fb408d6e832.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064dc.bin
be8d831c8ad4faf6b0bf9fd57ec9842135244a89ad29d3c03a6d643a0ea5f66a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64DC 4916 bytes
font_01_sfnt_off00007586.bin
2fae6e0d2daaf3f64faffc3418b66c16421e3a5a555a911d73bb9abe1e7798e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7586 10424 bytes

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