Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc51033b9d675c0c…

MALICIOUS

PDF

50.3 KB Created: 2020-11-04 15:49:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5c2b5c98b053735a031df16c4f52636d SHA-1: 482d53ef2b252708084ac618e8d2661f1d8344ae SHA-256: dc51033b9d675c0cde87bd78efa8f7d26b92fbfe99185e437aebbabaff5ded2b
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is disguised as a treadmill manual. The ML classifier also strongly indicated maliciousness. The embedded URLs suggest a pattern of hosting potentially malicious content on various cloud storage and content delivery networks.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=heavy+duty+manual+treadmill In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374545/normal_5fa1de9e6a54c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413369/normal_5f9f02cd6c429.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379054/normal_5f9e5d3ca0586.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369305/normal_5f89ac53b77b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368742/normal_5f9eb7ccbe883.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/workout_schedule_for_building_muscle.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/arihant_ccc_book_download_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/21491047862.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/kenwood_dnx692_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dcabd0c-820f-4c1e-93e3-0639972b857b/bofugupunumalojeda.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/55428807555.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45bf8042-0691-4df1-b553-69641b007987/42773918964.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/form_filling_jobs_in_usa_without_investment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b93e7ed5-d5af-4978-9f94-f5b3bfc46a04/idiograma_humano_normal.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00007292.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x7292 13444 bytes
SHA-256: f7e0ac8daf1f4937fde733a4149bdccadde2904ee8b4da6f1088f4c04359d35a
font_00_sfnt_off000061f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F1 4916 bytes
SHA-256: 3d2352fc15ce7622accaa121da27da42746d66045c97f9c9b34539fcbbae26ff
font_02_sfnt_off00009900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9900 10372 bytes
SHA-256: 675431f397d42621bd9fbb48de0ae22ecd46ef5c5cfb70dae7782bff07901a00

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