Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aaddf525661e23e…

MALICIOUS

PDF

54.9 KB Created: 2020-10-16 18:33:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0a376d08447bee896a61a90fcc2a70c7 SHA-1: 5a929dfbfdcd24054b6e1765b676216e50c6142a SHA-256: 4aaddf525661e23eb91f346bc8185cb8b5a0a3a6c2a7445156db14e2a71ecbda
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged as malicious due to a critical heuristic identifying it as a redirector link to known malicious infrastructure. It also contains a large number of external links, suggesting a link farm or SEO manipulation tactic. The primary IOC is the malicious redirector URL found within the document.

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://ggtraff.ru/123?keyword=kitoto+the+mighty+free+pdf In PDF document text
    • https://talapilodegopez.weebly.com/uploads/1/3/0/9/130969507/a324de.pdfIn PDF document text
    • https://sisaseno.weebly.com/uploads/1/3/0/7/130776680/dejexagufuno.pdfIn PDF document text
    • https://worobewunit.weebly.com/uploads/1/3/1/4/131406731/dirisoxibodupaj.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/lokidoradid.pdfIn PDF document text
    • https://topodomero.weebly.com/uploads/1/3/2/6/132696018/kunigu.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/sijuwoxujupid.pdfIn PDF document text
    • https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/93bad484fc.pdfIn PDF document text
    • https://nubojubixuxo.weebly.com/uploads/1/3/1/4/131410311/2844371.pdfIn PDF document text
    • https://topodomero.weebly.com/uploads/1/3/2/6/132696018/d4942bd0ec9686.pdfIn PDF document text
    • https://vefoxetewezelir.weebly.com/uploads/1/3/1/4/131483279/fujuresuwifu.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/terafowed.pdfIn PDF document text
    • https://fobewesepujub.weebly.com/uploads/1/3/2/3/132303403/zekude.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7368/1061/files/mercedes_shop_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7052/9436/files/suloxudavevekorok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/6946/4727/files/86467202122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1558/5448/files/53768581886.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f20cbe36-71d8-4eea-9e66-403cb148debf/tepasetuwew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd774696-0dfc-4bea-ac5c-0c2df1029e9f/getuxazarimovujujawine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec3d50d6-a7c9-4412-be4a-6e0554d70c2c/kapawelijemez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9302/4151/files/benojutuwov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6230/8247/files/72670601522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2260/6759/files/social_historical_context_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3638/4149/files/26447907713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3937/3477/files/68219480015.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_off00009aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AA0 5108 bytes
SHA-256: 85358286b8cb00e059bc05e14560df6306133d9d7e885824474c061133991043
font_01_sfnt_off0000abef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABEF 9976 bytes
SHA-256: 163c466c3324a24e139fa001be67abb70a8a35842b4e8fea838c115e7ec1f3eb

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