Malicious PDF — malware analysis report

Static analysis result for SHA-256 649a9f7f7f24a5fa…

MALICIOUS

PDF

55.8 KB Created: 2020-10-26 21:34:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 40eaca520377388a040199c10d07ad5c SHA-1: dd8297a03043c5c8b560620d81b2cf24e0ec0ac4 SHA-256: 649a9f7f7f24a5fa07e9769eb0508337c6f5324302e2a66c885c10fc9b193f6d
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://ttraff.me/123?keyword=asus+laptop+touch+screen+i5 In 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/1/0502/0735/9155/files/plant_classification_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6753/9093/files/kusudevavigexemidiluw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9646/5301/files/actividades_extraescolares_deportivas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3230/5054/files/10403798440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/2581/3663/files/18257489354.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7680/2967/files/navajo_county_2020_tax_lien_sale_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6120/6422/files/zombie_makeup_tips_without_latex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3556/4949/files/labavovomezixopalotap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9889/0150/files/tutorial_point_c_programming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f17fb0e-ece7-4c1f-a125-3e532a2f0769/22158659820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0645f612-197d-4e75-9150-f6c82696c04f/titaposepuvezerokamonol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f13b2c49-da45-48ea-9d6e-c0a63d2c974f/carta_de_resguardo_de_equipo.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/law_officers_pocket_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/autonomous_colleges_in_maharashtra.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/jipejazukiduranu.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/vugesozubiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/7187/0376/files/clover_dating_app_android_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/5958/2373/files/77391401436.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0780/2518/files/16597155387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1868/2007/files/monomevuganalitizutirewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6802/5751/files/zekakujejuwunedila.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/pumamen.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/jopuwifasesodaxomusol.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/79379359657.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_off000087ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87CA 5016 bytes
SHA-256: fbadfaf6d0765a3f7c730fcbe8f509ac6d3b41abc896b75ac7168757aa142a9f
font_01_sfnt_off000098cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98CB 12788 bytes
SHA-256: a3bc634e09398049c4afa08052e67b690028da4af43abc202bb2411b0210f88b
font_02_sfnt_off0000c24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC24D 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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