Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd8126e1e87bb119…

MALICIOUS

PDF

50.9 KB Created: 2020-10-28 13:49:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 1179b281d89be9063048f3a14c8f077a SHA-1: db4b609ed93e408c26295004e43214a690effb2f SHA-256: cd8126e1e87bb11936b93562e9fc4e34959f9a7299f2b3f631f50d70c78d8c60
154 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 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://gettraff.ru/strik?keyword=tesla+model+3+midnight+silver+metallic+vs+black In PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/vexed_fefeberudelu.pdfIn PDF document text
    • https://repafajekojila.weebly.com/uploads/1/3/4/3/134305679/zebawex_gokerapiketer_visupopat.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/resadikopipuvu.pdfIn PDF document text
    • https://subarijarasojud.weebly.com/uploads/1/3/4/3/134332778/bivijekinu.pdfIn PDF document text
    • https://rodamopuxex.weebly.com/uploads/1/3/4/3/134354351/xuzarafor.pdfIn PDF document text
    • https://xogefuvoza.weebly.com/uploads/1/3/2/3/132303221/pibufaferorutax.pdfIn PDF document text
    • https://koworuvixoduto.weebly.com/uploads/1/3/4/3/134352933/6676586.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/2270515.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/foburadip.pdfIn PDF document text
    • https://miburinu.weebly.com/uploads/1/3/4/4/134464577/mewebu.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/1/0431/9327/0429/files/74002792713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2162/9102/files/snaptube_cracked_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5289/8739/files/kasanokiminutori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/0698/1830/files/fukexob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cd66c26-9dcc-4388-a23b-b0fa5d83e31d/zabekawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5103/0949/files/64549655720.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2339/1656/files/que_es_una_matriz_de_riesgos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/7450/9732/files/fritzing_simulation_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5201/3985/files/36100433723.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5574/1589/files/mise_a_jour_android_galaxy_s7_edge.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_off00007919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7919 5516 bytes
SHA-256: 23452fd391a956e2c49ac0772d4f98c464b36d603ffbb11a7fe2da95457158c9
font_01_sfnt_off00008bb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB1 10648 bytes
SHA-256: 178184f94e37ef4919c899a9cd7edfb8b743dcf9a775ef2132621e0d827ed035
font_02_sfnt_off0000afb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFB6 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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