Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee4871ab32f0b13…

MALICIOUS

PDF

45.6 KB Created: 2020-10-03 23:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 32e5c8e7b2aad4b979be129662dff8e3 SHA-1: 2c2c9599c03ccff71898633c7eb0c34ce469e1c6 SHA-256: 0ee4871ab32f0b13e6f6bae97f973479dc7dbb34a87e8b9503b9311145375ac4
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on what appears to be a link farm infrastructure. One of the primary links, https://ggtraff.ru/strik?keyword=2+bedroom+house+plans+and+pictures, is flagged as a known malicious redirector. This suggests the document is designed to lure users to malicious sites, likely for phishing or malware distribution.

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/strik?keyword=2+bedroom+house+plans+and+pictures In PDF document text
    • https://site-1036627.mozfiles.com/files/1036627/60297807053.pdfIn PDF document text
    • https://site-1037178.mozfiles.com/files/1037178/xilifigan.pdfIn PDF document text
    • https://site-1039651.mozfiles.com/files/1039651/peteganewawamusejonekusom.pdfIn PDF document text
    • https://site-1036934.mozfiles.com/files/1036934/kegogirufinowabekibad.pdfIn PDF document text
    • https://site-1036834.mozfiles.com/files/1036834/21411706478.pdfIn PDF document text
    • http://files.marypurdy.com/uploads/1/3/2/7/132740620/pojuxibukiwum.pdfIn PDF document text
    • http://nipiri.tuttlesnursery.com/uploads/1/3/1/1/131164250/5436244.pdfIn PDF document text
    • http://files.candleandbodyshop.com/uploads/1/3/1/4/131482991/kexedoxubizes-fugupu-putozikumepafo-kakisuduvinuxa.pdfIn PDF document text
    • http://files.claireventures.com/uploads/1/3/1/4/131408103/bokurew.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/1/0428/8515/2927/files/40306339308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8515/2927/files/83609996995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/0333/8902/files/assassins_creed_identity_android_apk_uptodown.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5077/3909/files/tuzak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8344/5925/files/nofukix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7539/4977/files/powax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/4447/2485/files/graphing_logarithmic_functions_worksheet_rpdp_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3887/9143/files/numonufa.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_off000070a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70A1 5492 bytes
SHA-256: bdcf50204f7c1ce66fd6cc4f543dacb23ca9c2a5d7d6ab56778f9c09daa12e5b
font_01_sfnt_off00008315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8315 10668 bytes
SHA-256: f352617d695719a822f4a4db301db83797355130b611a0dc7a843baa5f7abb90

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