Malicious PDF — malware analysis report

Static analysis result for SHA-256 2565a03f0fb347b9…

MALICIOUS

PDF

41.7 KB Created: 2020-10-29 12:19:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c9238f54a41b6649ee8e0d7bce9dda5 SHA-1: 920c972ac4c3c620b893ba1d305863fb36a5904b SHA-256: 2565a03f0fb347b9033acf4b54083312fc7aa2e9bbcbd97a031bcf1912fc4411
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, including a critical redirector link to 'gettraff.ru', suggesting a link farm or SEO poisoning attack. The document body, though heavily obfuscated, contains references to the same URLs, indicating an attempt to drive traffic to malicious or potentially malicious sites. The ML classifier also strongly flagged this PDF as malicious.

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://gettraff.ru/strik?keyword=marc+jacobs+wedding+erika+jayne
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/2755526.pdf
    • https://cdn-cms.f-static.net/uploads/4383450/normal_5f8faeff3b8d8.pdf
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/xofij.pdf
    • https://cdn-cms.f-static.net/uploads/4371244/normal_5f8c21403ceb6.pdf
    • https://cdn-cms.f-static.net/uploads/4371523/normal_5f90a1f5ab7f9.pdf
    • https://cdn-cms.f-static.net/uploads/4388841/normal_5f97ac7b91281.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/44b50bf9-0b1f-4c83-b690-4e3b37756086/8913982448.pdf
    • https://uploads.strikinglycdn.com/files/85bea086-549e-465b-b0ee-0d3958c150a7/15016151083.pdf
    • https://s3.amazonaws.com/potofaw/zezemolu.pdf
    • https://s3.amazonaws.com/leguvefu/kondisi_perekonomian_indonesia_saat_ini.pdf
    • https://uploads.strikinglycdn.com/files/999d535e-12d0-4147-8324-a8b655393571/gokowusujugonepivepis.pdf
    • https://uploads.strikinglycdn.com/files/6e8fe525-0c32-4d90-a663-fd9698afa759/dorixipibubinel.pdf
    • https://uploads.strikinglycdn.com/files/1078724d-a78c-45db-8a63-20d79aeb7d72/nugubinojasadeda.pdf
    • https://uploads.strikinglycdn.com/files/a0dbb7d4-e5e0-4e1e-a70d-7b6838b08629/21819925601.pdf
    • https://uploads.strikinglycdn.com/files/379609a1-b877-4818-8a8e-ec0bbc96c496/kedekowananowepakulodik.pdf
    • https://s3.amazonaws.com/zuxadol/fuboxuvopumetosif.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_off00006225.bin
5e1c9ccc7fbd89509865f5b36f6f2ccf6a85d905ecdcc4b76a94361e3267f8c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6225 5552 bytes
font_01_sfnt_off00007539.bin
953dce9f7d8e3de9274e894065ebaf47d0e69e42eebd6cc88ea1df4e6448067e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7539 11188 bytes

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