Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d027f1a0c782154…

MALICIOUS

PDF

46.3 KB Created: 2020-10-25 19:40:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 969f5fd3ea84e2a3e654216fa51fc75f SHA-1: 17874e502cc6ad81d039ece8042e51bb8378c335 SHA-256: 2d027f1a0c7821546a92fdd0f24259306e3f6d3c232fab9df01e90b3265beaf8
154 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to a known malicious infrastructure, disguised with a seemingly benign search query. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests an attempt to distribute malicious content or engage in SEO abuse. No scripts were extracted, but the primary attack vector appears to be directing users to a malicious URL.

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/123?keyword=4+string+bass+guitar+chord+chart+pdf In PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/nesubine.pdfIn PDF document text
    • https://kibutabez.weebly.com/uploads/1/3/4/4/134438896/pagimuja.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/6326761.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/7171184.pdfIn PDF document text
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/peval-kamerip.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/dbbd04.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/09427c23789b.pdfIn PDF document text
    • https://nulixedupalaz.weebly.com/uploads/1/3/0/7/130739510/besajadul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5f898372161fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379837/normal_5f944584daa4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379856/normal_5f922c369c35d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367277/normal_5f87ad1f48cd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368991/normal_5f87e9f5b18f1.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://uploads.strikinglycdn.com/files/442752bb-c7d7-42d1-834e-8e8db432e280/vabekemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6d270ca-6dce-419a-89bb-ccad080941ec/48767170787.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f9d7a7f-a7a5-4a2a-9728-9ec4ecaf907f/87668144373.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/collins_scrabble_word_list.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/gerorovinafaxo.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/marojazibudej.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/vobutobevujezufakepag.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/10452909567.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/lirovosamorivoj.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/subject_verb_agreement_worksheets_5th_grade.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_off000068a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68A1 5284 bytes
SHA-256: 50fc03587c121aa889192a22913e73b15c8aa0b2da0b799fb8e26fda65591adf
font_01_sfnt_off00007a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A7C 10296 bytes
SHA-256: 74de5b32abbe9a334e53090949eba11fa7ac2e6c83929909ca160910c5de9138
font_02_sfnt_off00009d87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D87 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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