Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe5833f7588b0948…

MALICIOUS

PDF

35.3 KB Created: 2020-11-04 06:45:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9a8fbacd52f6b0fa6d62ee4dad2dcf3b SHA-1: 5ead9e37c2a35d71992acf8ded2b4dbc406300e5 SHA-256: fe5833f7588b0948d8b0d92633b0fce61481972465aa9f644ccd40a0ef115a37
162 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a known malicious redirector. The document body, though heavily obfuscated, appears to contain the URL 'https://ggtraff.ru/aws?keyword=gwhs+sf+bell+schedule', suggesting the primary goal is to redirect the user to malicious infrastructure. The presence of numerous other PDF links further supports a link-farming or redirection-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ggtraff.ru/aws?keyword=gwhs+sf+bell+schedule In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379982/normal_5f93cf8d11c6d.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/1507003.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384154/normal_5f9a8db788350.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366655/normal_5f8d0aa291987.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381105/normal_5f8f9247def01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371005/normal_5f9318c33fdef.pdfIn PDF document text
    • https://tusutaxuwipafu.weebly.com/uploads/1/3/4/4/134403355/6119811.pdfIn PDF document text
    • https://turomanusogagi.weebly.com/uploads/1/3/1/4/131453559/3694847.pdfIn PDF document text
    • https://ziwodenitisal.weebly.com/uploads/1/3/4/3/134350364/58fd5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d5e2fe6-eace-454f-bb1c-14905ce395c3/45852057775.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9b47f84-e4e4-4c52-83b2-c4adce5b57de/xovijiwugotof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c8024aa-faff-4109-b0db-7ed596443be4/63801070004.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/147ce2c5-081b-437a-8d0c-bc4ab7d666ab/8572334743.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C83 5068 bytes
SHA-256: ca4fd60a093de878e077a3f955ec03b576b9753e79967b433712536651ba7a3d
font_01_sfnt_off00005dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD8 10476 bytes
SHA-256: 6e0b3a54d7bf73e1ec7220005b21c5c7cd0717b7bb521b784bc55bb31d384ce3

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