Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ff65371f7620e7a…

MALICIOUS

PDF

42.8 KB Created: 2020-10-30 21:22:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: baa79bba9b2b84162a2386ebcd368787 SHA-1: d7f1b8eebc28ceed8291b57df0c498f4074dd2a6 SHA-256: 7ff65371f7620e7a945f08bb25997f8c72d9d1a536b125ddff6964dbb3dcddfb
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ttraff.club/123?keyword=alvin+isd+calendar+2016-17 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4402504/normal_5f9898a8c45fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375077/normal_5f9aad3b2ce45.pdfIn PDF document text
    • https://razixolinatu.weebly.com/uploads/1/3/4/3/134384461/8982824.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/77c24ad3e119c.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/1/0499/3466/3841/files/photosynthesis_worksheet_7th_grade_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3721/9735/files/stardew_valley_bundles_guide_by_season.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a8d4219-ac06-4c87-82ca-1550bbfe5db6/14306051853.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8462/7616/files/wuxupixekevobilow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2135/1587/files/nurxiovo_cotton_candy_machine_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7145/8468/files/99953526207.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/xuzowikumozesitegi.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/58061804859.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/17074895723.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_off0000667a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x667A 5572 bytes
SHA-256: cdbaae1da93594e67a95d65272ff0aa16d4a59b8a349e2088ab0b6d031782453
font_01_sfnt_off00007996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7996 10924 bytes
SHA-256: c897aa0208150a012478e7467492650fd83df5db17480290f0a17ee3ed9a9e2d