Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c1ac418c234f0f6…

MALICIOUS

PDF

47.4 KB Created: 2020-10-22 19:15:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: af44bfa420a6e205746133f1b9627527 SHA-1: d76fd86b8abc884cad6edc754cd7f0af86a34044 SHA-256: 8c1ac418c234f0f6e89f59cb7444939044417a4f4dc0d343223cc87b44cdc971
94 Risk Score
Tags
free-cdn-ebook-manual-lure

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.cc/123?keyword=srimad+ramayanam+telugu+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389603/normal_5f90eb1c36816.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375351/normal_5f8eb46614304.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383147/normal_5f8fd53a62125.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373757/normal_5f8deebe52c40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f871454b1181.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370768/normal_5f8ec5537ecc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387813/normal_5f8ec254270ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5f872dbf69787.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_5f8e06a6e5e22.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/susopuzupure/nuzolusivitemubetidunam.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/apa_style_research_paper_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e603cab1-3fe3-4078-bdd9-a44e086832bd/jubarireluvekomisev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffda8172-237c-4eb3-b807-0bbc5ef52661/nawatekodepo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b519fcfb-9b82-4da8-a38f-b0b7e34776f2/26940576726.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f020da08-184c-4f78-b8f3-456bfba945c1/88168434944.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/11894783528.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/barcarolle_piano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d0f7030-214a-4599-8327-d73fae024fdd/77606326640.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5da3067-e273-4930-8152-5be9b0043393/xibafumezimiwawugaxon.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52C9 5160 bytes
SHA-256: 8dc00b8719db8a012245d18e44b86021fd39c523d4fc8421e752bf0f8a66d645
font_01_sfnt_off00006436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6436 11560 bytes
SHA-256: 60fc50f14aefbeaf5eda88719c6650b29fcad3f94b9bf84b927cd15f3dd6c157
font_02_sfnt_off00008adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ADB 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e
font_03_sfnt_off00009ff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FF0 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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