Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8417475e4544c46…

MALICIOUS

PDF

41.0 KB Created: 2020-07-09 17:04:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e44f12da5199b07bdcff2108eb8f51e9 SHA-1: 9f4c16e47443b0fe6e94bfbeb3e4d07af6780f88 SHA-256: d8417475e4544c46a57964f4cb6bd32459d9d957f0b64020312d950d9db19b9a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a link to 'ttraff.com', indicating malicious redirector infrastructure. The document body, though heavily obfuscated, contains similar URLs, suggesting the primary purpose is to drive traffic to these malicious sites, likely for further exploitation or phishing.

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/wb?keyword=list%20countable%20and%20uncountable%20nouns%20pdf
    • http://files.aristaeusfarms.com/uploads/1/3/1/4/131455463/webozepitulo.pdf
    • http://files.comoxvalleyringette.com/uploads/1/3/2/6/132683400/xibepexumatop.pdf
    • http://files.christinarjackson.com/uploads/1/3/1/4/131437983/kalizo.pdf
    • http://files.flavaevolution.com/uploads/1/3/1/6/131606640/9590223.pdf
    • http://files.newyorkstategrandcouncil.com/uploads/1/3/1/4/131437538/bapemo.pdf
    • http://files.heavencanbefound.com/uploads/1/3/1/3/131384018/tizalunovemili.pdf
    • https://pirusuzu.files.wordpress.com/2020/06/17560746637.pdf
    • https://numuwaxuwilo94341109.files.wordpress.com/2020/07/kugijejow.pdf
    • https://kurizuveji.files.wordpress.com/2020/06/zuwivukowemagu.pdf
    • https://wasumuf.files.wordpress.com/2020/07/72673674472.pdf
    • https://vufiwajemo.files.wordpress.com/2020/07/51923334558.pdf
    • https://womimoxik.files.wordpress.com/2020/06/dipiko.pdf
    • https://febidaj.files.wordpress.com/2020/06/13933870074.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45397061855.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96226605796.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/demajez.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32296476761.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sejil.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/
    • https://cdn.shopify.com/s/files/1/043

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064e2.bin
fd3955c103b87760bcf7105fb75e6df1f1abcd928ee5f5a1315e85c666b8fa05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E2 5016 bytes
font_01_sfnt_off000075f3.bin
4ead69370924b6541d230ad68a0c7a9ebd599b0eb4d565d6ca8afd2bcd523182		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75F3 9744 bytes

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