Malicious PDF — malware analysis report

Static analysis result for SHA-256 17299374ba5db217…

MALICIOUS

PDF

50.2 KB Created: 2020-11-02 03:40:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a57d1d57ed40640da7b7b06c17f670ef SHA-1: 90180f31fb237f0a2dd846c7359dd0b485104c7d SHA-256: 17299374ba5db21754f762006c7d4849af7148a9dfcd113c3c5128a93b56a90f
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous links, including one pointing to a known malicious redirector at 'ggtraff.ru'. The document body, though heavily obfuscated, contains text related to directions and a URL that appears to be part of an SEO link farm. The presence of embedded links and the ML classifier's high confidence score indicate a malicious intent, likely to redirect users to malicious infrastructure.

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://ggtraff.ru/aws?keyword=directions+to+butte+creek+falls In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404514/normal_5f9c7360cd316.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370064/normal_5f88bac365ce7.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/jezobadu.pdfIn PDF document text
    • https://bipinutafo.weebly.com/uploads/1/3/4/3/134358532/xuganoxox_fagot_lujuluduz.pdfIn PDF document text
    • https://tixovokibena.weebly.com/uploads/1/3/4/1/134109053/sebofomezolu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f95406900351.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369781/normal_5f89ce4f43d13.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/kigavanus/gesugitiwasimujolibine.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/pebubakuxoxe.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/totazugapupuzip.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/genestealer_cult_codex_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/51050944530.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_off00008747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8747 5080 bytes
SHA-256: 686165a09738e8f41b1421a5cc404b901b8fd2260ca080fdacf808585e0a21de
font_01_sfnt_off000098a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98A9 10324 bytes
SHA-256: 130aae045188ced5147c60ac36122f4f36392dba7a1c5bdcb3d4749cefe839fa

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