Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb6548bc3210d9db…

MALICIOUS

PDF

183.8 KB Created: 2020-10-24 06:17:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1c29af5bd424f3fafbe1a45cb4293bbc SHA-1: 32e9949481a7e44bfab79c3c3fa0dcb17c08b674 SHA-256: fb6548bc3210d9dbc1b53f300324acac5e169849ed882e80635fde79b084c0b7
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 heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123?keyword=tal%2527dorei+campaign+guide+anyflip'. The ML classifier also flagged this PDF as malicious with a high probability. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gettraff.ru/123?keyword=tal%2527dorei+campaign+guide+anyflip In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403417/normal_5f937cdc25268.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/bodepedejub.pdfIn PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/kanofobelosi.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/bizuz.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/1145be3e.pdfIn 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/fasanag/la_banalit_du_mal_hannah_arendt.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/michael_boyle_functional_training_for_sports.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/67060602025.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/kasuniwenevujanitojidaso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6929/9101/files/plant_life_cycle_worksheet_3rd_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7160/5410/files/ge_portable_ac_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/7534/6847/files/download_m_tix_apk_terbaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2940/0221/files/77822784409.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/17529284104.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/hr_technical_interview_questions_and_answers_for_freshers.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/outsourcing_ventajas_y_desventajas.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/simple_lease_agreement_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/baeyer_villiger_rearrangement.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/bifobanuxoxinixuzufodox.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_off0002694e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2694E 5184 bytes
SHA-256: 0dd678f2ceaf0cab2f2053c58d2268907e577399c580a1664a7864ceacff236d
font_01_sfnt_off00027ae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27AE2 15744 bytes
SHA-256: e2f58bdc2aa5aea8f6820d39e39aef59204a62bcfbb6ab40d1e63276435eff7b
font_02_sfnt_off0002abdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ABDC 16208 bytes
SHA-256: 8a920642403e862b8d76a30d6502ed32e081761114de4860b32093463e1ee433
font_03_sfnt_off0002c122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C122 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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