Malicious PDF — malware analysis report

Static analysis result for SHA-256 08df65636beaffa5…

MALICIOUS

PDF

40.7 KB Created: 2020-11-03 14:02:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 31731be75ee26d3eef32cd8244d04e81 SHA-1: 201d50efc4d4ff5f350830a7ef43c4bc2b3371a5 SHA-256: 08df65636beaffa594f08e1f47d0796f74223cfeb1878f66d62e778843c3b49c
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and 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 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=r+and+r+pizza+safford+az In PDF document text
    • https://vebifejelib.weebly.com/uploads/1/3/0/7/130775119/ddf8a70db761ffa.pdfIn PDF document text
    • https://detosujedeke.weebly.com/uploads/1/3/4/3/134371576/fuxopafurewoxewi.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/950d1c5f7c64.pdfIn PDF document text
    • https://valodoxajub.weebly.com/uploads/1/3/4/4/134435871/da330f8d42a9bf.pdfIn PDF document text
    • https://lulitetuxopibol.weebly.com/uploads/1/3/1/1/131164377/e30c0271c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366371/normal_5f8e337888060.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/zalivur.pdfIn PDF document text
    • https://dofazodasi.weebly.com/uploads/1/3/0/8/130873943/4975078.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/siwizus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/metisowupuvagofolebesix.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/lost_highway_hank_williams_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/big_fat_notebook_math.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/schneider_nsx_mccb_catalogue_2018.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54AE 2968 bytes
SHA-256: a3409f23d318cb64f50816b13ffa5e4cae8c31e9b9ecf1c6aab81bc325688a60
font_01_sfnt_off00005f53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F53 5060 bytes
SHA-256: 70bf4d1adbd3a9e25ababfcffd436fffd489883c22b54920f713dcde4974e521
font_02_sfnt_off000070a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70A4 10964 bytes
SHA-256: ffe6cec165a525d0431826bee5b39863d1efd188431179fcca56087092258f91

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