Malicious PDF — malware analysis report

Static analysis result for SHA-256 6597dcba08c7dbbd…

MALICIOUS

PDF

44.8 KB Created: 2020-10-02 20:39:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: af8cbd87e525f93be31730347042a327 SHA-1: 57f41d7f0c43d418bbe0617370b3f326260bb997 SHA-256: 6597dcba08c7dbbd6d95c0f4822900c2da301d104be1e83b909cf1b2bcb6b869
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM. The document body, though heavily obfuscated, contains a URL that matches one of the identified malicious links. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves directing users to external, potentially harmful content.

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=hell+in+a+very+small+place In PDF document text
    • http://files.renee-store.com/uploads/1/3/0/8/130814575/4139023.pdfIn PDF document text
    • http://wivewevok.10000wordsphotography.com/uploads/1/3/1/3/131381489/31168d4bd58330.pdfIn PDF document text
    • http://gifum.medinfodoc.net/uploads/1/3/2/7/132710567/xasusepi.pdfIn PDF document text
    • https://site-1039656.mozfiles.com/files/1039656/fixiza.pdfIn PDF document text
    • https://site-1037094.mozfiles.com/files/1037094/tobokizisowujo.pdfIn PDF document text
    • https://site-1037859.mozfiles.com/files/1037859/zarutopazisi.pdfIn PDF document text
    • https://site-1040398.mozfiles.com/files/1040398/xifuwozeravavisezoze.pdfIn PDF document text
    • https://site-1037842.mozfiles.com/files/1037842/zubonexekagul.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/1/0432/9118/1214/files/autodesk_lustre_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5870/8136/files/kinetotovujopavefepuba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6668/6617/files/37568583393.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6090/1526/files/93070294240.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4440/1052/files/43698176798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/783c46c5-2002-4956-bb06-fa481c5b1687/69534611230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daad4454-f5da-47a0-82e5-a0ade7b1dced/feberas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28f462e5-a061-4d9b-90b2-c2e9c870ade2/79476559713.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eebef405-06f7-4c7e-8264-20594fca5fa7/96357064273.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f99609ce-da67-4beb-835b-8366a1913a1e/36041046772.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_off00007094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7094 5200 bytes
SHA-256: 6e190c26ae484a15b8dbe16ae285f0a3822d0dfac2900126d6b1a39744beb7d7
font_01_sfnt_off0000823d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x823D 10728 bytes
SHA-256: f37ba2300379516e9de1167e46e475c4454316465373108790eed686f7ead461

Open this report in the interactive analyzer, or submit your own file for analysis.