Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee92f00547c6bc7f…

MALICIOUS

PDF

52.3 KB Created: 2020-11-03 11:12:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: bb728dc51682a88940af869db1dc7918 SHA-1: 97b10d06caf4a9faad26118a9eb944c67e0e3fb0 SHA-256: ee92f00547c6bc7f7ee4a0570a045879fbfde60404fcd41e92a7c3f8d198861a
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external resources. One of the primary links, 'https://cctraff.ru/aws?keyword=free+scp+secret+laboratory+admin+passwords', is flagged as a known malicious redirector. The presence of numerous links suggests an attempt to direct users to potentially harmful content, possibly for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is indicative of a link farm attack.

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://cctraff.ru/aws?keyword=free+scp+secret+laboratory+admin+passwords In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nitajosasa/57099639778.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/3936/5546/files/sarvanam_worksheets_for_grade_3_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9225/4105/files/6630588838.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/paribobesusi.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/paloketaronegasakosobe.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/5047549400.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/badger_100_airbrush_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/hacks_para_adopt_me_roblox_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/acrobat_pro_vselement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4bd7548-f8ad-4ef5-80f5-fdbc64cda774/vunulad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab6dd160-9547-4511-b9dc-0c1aea1a32b5/82886354569.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/pafode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7497/0286/files/26262278877.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6487 5296 bytes
SHA-256: 2c473dac00f059f0dad96447dd537314974a103dbf9ecae16c9e7c727fff8ce3
font_01_sfnt_off00007676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7676 10872 bytes
SHA-256: df8a9d1db61849052569d9b2eaf90f7cfdc2af3f8cea84a4e9862ab82ea73905
font_02_sfnt_off00009bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BAC 17500 bytes
SHA-256: 9c8e6ab2bbe0efb43198956f28f11c6829d0534682a64505c1ca73ca5ab92d44
font_03_sfnt_off0000b592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB592 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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