Malicious PDF — malware analysis report

Static analysis result for SHA-256 17a96d5cf3629311…

MALICIOUS

PDF

78.6 KB Created: 2020-10-03 21:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 84ef69a555640df9143f48dd8fbe5d61 SHA-1: a51052f68fbc766d29c593f579e433f7da09bbad SHA-256: 17a96d5cf3629311a5bd577bf613b341602859d9ad8d4974bf9a6c1227d952fa
154 Risk Score

Malware Insights

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

The PDF contains a high number of external links, many pointing to what appears to be a link farm designed to host SEO-optimized PDFs. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://gettraff.ru/strik?keyword=sanitation+system+pdf'. The document body also contains this URL, suggesting it's the primary lure. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution attempt.

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=sanitation+system+pdf In PDF document text
    • http://jiresobi.holisticfamilycare.com/uploads/1/3/1/0/131070627/6203095.pdfIn PDF document text
    • http://files.seafoodconnectiontogo.com/uploads/1/3/1/6/131607522/584fb3c12cb1.pdfIn PDF document text
    • http://dusomaj.thekeytotorah.com/uploads/1/3/1/6/131637291/3345524.pdfIn PDF document text
    • http://files.highlandconservancy.net/uploads/1/3/1/1/131163712/witipobobunapafig.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/1/0482/0385/8077/files/lyrics_to_wheel_in_the_sky.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0214/6212/files/cabo_rico_38_layout.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6174/7620/files/the_cultures_of_the_west_a_history_volume_2_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8896/0406/files/todemipanovofokiba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2678/6715/files/18041371090.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/5338/3581/files/8466393712.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3114/6908/files/lawuzokagafit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6576/9625/files/kiwilaxuperimusakufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/2449/5004/files/5812806123.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dbc497e-e15c-4431-b063-f3bafa992b2c/weluwebevoxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be511a26-9e78-4a37-858d-431da95563c3/fetujixovewilegexuwaxamex.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_off0000f179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF179 5264 bytes
SHA-256: d203fb5b1a1651c5a5a8e0ec95c20924882f4a8ca55c86dd8b948f757717745f
font_01_sfnt_off0001035e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035E 13320 bytes
SHA-256: 60214b5297a7b474cbe22eafe392b1779b483c630818e13b8d821fdb2ccc3d8e

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