Malicious PDF — malware analysis report

Static analysis result for SHA-256 b356604d58f1c4e7…

MALICIOUS

PDF

43.4 KB Created: 2020-11-02 12:02:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1cb555c1f4ff1df9ea52b5ae9a2b8894 SHA-1: 8743ac385bf6ce85c7399d135f70cbfacbfa1f69 SHA-256: b356604d58f1c4e7b236b4c80111ce600491bedad97a1a2e4c397723fd5bf93c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded links, many pointing to redirector infrastructure and potentially malicious content farms. The primary URL, https://gettraff.ru/123?keyword=amdapor+keep+guide, is flagged as a malicious redirector. This suggests the document's purpose is to lead users to malicious websites, likely for further exploitation or malware delivery.

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/123?keyword=amdapor+keep+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404124/normal_5f9fc3da6c2e0.pdfIn PDF document text
    • https://radutarogo.weebly.com/uploads/1/3/4/3/134379411/vopimadivufigegoka.pdfIn PDF document text
    • https://lafuworopiraw.weebly.com/uploads/1/3/4/3/134341657/83979d081.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421365/normal_5f966c427523c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384299/normal_5f95a34ce6a17.pdfIn PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/f1566ba9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zasepo/annual_general_meeting_companies_act_2013.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/9408171777.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5998541-d1a0-4b7e-bc94-3a81aab070f4/cdl_manual_ny.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4512/3738/files/marcus_oakdale_theater_address.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0490/0909/8919/files/toy_story_ytp_buzz_gets_revenge.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1B 4820 bytes
SHA-256: 555f843de8458b8880bc18d2275aacd7e23ba4e98593dfcc4a66d584de5dca7c
font_01_sfnt_off00006f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7A 10412 bytes
SHA-256: 7790e07c98c8ae5225f1ab67071b7f2bc6f0f99bb39f30c40cff3ab01ed4a869
font_02_sfnt_off00009326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9326 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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