Malicious PDF — malware analysis report

Static analysis result for SHA-256 d529a306eaa5521e…

MALICIOUS

PDF

117.8 KB Created: 2020-10-09 03:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 2598d1fae2d54905250acb894f784aa0 SHA-1: 79f7bc8568087cb43854f29d0e94850156c23aaf SHA-256: d529a306eaa5521e3e6755595de5b8e6992876ff4d26b5f407bcbd602d5188f7
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to domains that appear to be part of a link farm designed to host malicious content. One critical heuristic identified a link to known malicious redirector infrastructure, specifically `https://gettraff.ru/strik?keyword=bible+promises+in+tamil+pdf`. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect users to malicious sites.

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=bible+promises+in+tamil+pdf In PDF document text
    • http://files.emeraldcitytherapies.com/uploads/1/3/1/3/131379045/249fe.pdfIn PDF document text
    • http://files.mooipermanentemakeup.com/uploads/1/3/1/3/131383297/daruxiluja.pdfIn PDF document text
    • http://nurudufu.virginiamastrogiannaki.com/uploads/1/3/1/4/131407089/f263c7ba9502.pdfIn PDF document text
    • http://sijotexun.graceforthebroken.org/uploads/1/3/2/6/132695780/vexemawepogu.pdfIn PDF document text
    • https://site-1039578.mozfiles.com/files/1039578/musedeletaj.pdfIn PDF document text
    • https://site-1036760.mozfiles.com/files/1036760/jetikuzenegelezak.pdfIn PDF document text
    • https://site-1037033.mozfiles.com/files/1037033/junaxuv.pdfIn PDF document text
    • https://site-1043530.mozfiles.com/files/1043530/nuporuwewopojax.pdfIn PDF document text
    • https://site-1036862.mozfiles.com/files/1036862/dunuf.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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/1/0499/6995/4984/files/roxubevekoruze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3648/2458/files/86788041066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1386/5124/files/pujos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7077/4677/files/teach_with_portals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6753/0657/files/82383580584.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a4e13cc-06ce-4c3a-b702-7c3ce741dc3f/vobafifokudutodesajeme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc516dd6-ba9d-41d0-9d34-e10bd89bd86a/nupozesotirop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85a22c25-6917-424c-adcc-c3290149b16a/wobumazinebafotivedususa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/941315d5-c5bb-400d-b7b1-74467afb0b0b/74713928852.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
stream_006_off00018208.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x18208 15100 bytes
SHA-256: fba8adb6c3d8f7ca10fa42b0ba66c7a43278d9e068a956a547a32cc7f4448f6a
font_00_sfnt_off00016fe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FE2 5376 bytes
SHA-256: a18077a8a69329656f3883bb2cd5b9437aca141b3d02815900551c65a06ed94a
font_02_sfnt_off0001a5f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A5F9 10240 bytes
SHA-256: 928c67f809a10fb50afb9f4ac125e5cbd901d62011eb23cb273044e2e79a865e

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