Malicious PDF — malware analysis report

Static analysis result for SHA-256 38d07d21b711d16f…

MALICIOUS

PDF

51.0 KB Created: 2020-10-26 17:59:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 566ac60de45c03c14f383ed126af09e8 SHA-1: bf9899d1545c939d0c3812fcd758c88e20045183 SHA-256: 38d07d21b711d16f0a0e70ee16ec6f0b578b42d7d2b2647bfa66c1663ae5b007
154 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 that redirects to a malicious URL, masquerading as a download for a premium APK. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this behavior. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded links, suggesting an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. No scripts were extracted, but the primary attack vector is the malicious link.

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://ttraff.ru/123?keyword=dictionary.com+premium+apk+7.5.8 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366376/normal_5f8710abd3c79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369509/normal_5f934cb38f646.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367640/normal_5f874fb1a3667.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410432/normal_5f93545f8b875.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369656/normal_5f93e84d32997.pdfIn PDF document text
    • https://wimolakerozer.weebly.com/uploads/1/3/4/4/134448160/jilawopev.pdfIn PDF document text
    • https://xonuguzuv.weebly.com/uploads/1/3/1/3/131382030/gamogeza.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/zidebesirolabavo.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://cdn.shopify.com/s/files/1/0498/9331/0631/files/vicks_vaporizer_model_v150_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6109/9682/files/depizogitejamajomeranivu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3897/3345/files/top_strategy_games_2020_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9087/9667/files/can_you_build_android_apps_with_python.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76d99a0a-57f3-47b8-aca8-721dbd6da609/90476819995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daaa881a-b709-4659-8624-23c57030c584/fodumexobazanabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c730ab7c-6229-46cc-810e-e6916bd983ed/38189770184.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/221a75a6-dedc-4bc1-8a32-2ff4b40f2ded/fallout_nv_sex_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/39875725698.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/artificial_sweeteners_in_india.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_off000063a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A7 5348 bytes
SHA-256: b951ac6066d8b77ec35c280a941bf9255bbc5afcda2ade324512b74fe3338437
font_01_sfnt_off000075d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D5 11048 bytes
SHA-256: e3d4043586cda56d783b2ba211b25345aa086aba5845b0f75c196c34fbe2c1d0
font_02_sfnt_off00009bb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BB7 16088 bytes
SHA-256: 700ff7bf493bf9bab5e7bd19ce07725d6ad682c9ec1bd4c381fbd4d74ba1924a
font_03_sfnt_off0000b06c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB06C 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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