Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b56f6288bc3e696…

MALICIOUS

PDF

50.7 KB Created: 2020-10-25 16:10:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: da6c0acd63a3d4b84e3487d99f2bb57f SHA-1: b02b8adb0cfe9099efa754d257113aff057f3e28 SHA-256: 8b56f6288bc3e696e4303e5a0d160ab0721c845605cebc1d5d6c9ed5fed54109
154 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and contains a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs suggesting it is part of a link farm or SEO spam campaign. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

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.com/123?keyword=slab+on+grade+design+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368487/normal_5f89499bf2cd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381098/normal_5f8bb49962c14.pdfIn PDF document text
    • https://kudumegowejo.weebly.com/uploads/1/3/4/2/134266354/laxelitifesesuv-bijutor-kuvewakoxi-manukomo.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/d7d3b179ef424dc.pdfIn PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/8015620.pdfIn PDF document text
    • https://nudopimiga.weebly.com/uploads/1/3/1/0/131070212/81f48c42b.pdfIn PDF document text
    • https://mekuxiwefajup.weebly.com/uploads/1/3/0/7/130739023/085ca66d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0f4a990-3375-4ad8-bab2-b795d22c3611/53248161471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c8a688a-c469-48de-b5b6-60c9069c2778/wopilaxisisifusef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df33cc83-3ddc-43b9-94ab-4b27c19604ec/vufujofafozivipaziv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1562680-a32b-4cc9-b175-6b2067c5bacd/7620835971.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/salarakememageker.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/wizevivulosupitopopiku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/8758/7237/files/enregistrer_appel_video_whatsapp_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1865/8207/files/wavapa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5348/0611/files/zidagizunesapowakurupuror.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0056/0805/files/meridian_59_leveling_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7808/1959/files/specially_designed_instruction_for_executive_functioning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1016/5416/files/simple_and_compound_machine_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7522/3206/files/7181601088.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_off000086bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86BB 5236 bytes
SHA-256: bd1285441c91964ecf807123cb67162ed2da32d6f8c2e1cad3eee633de094917
font_01_sfnt_off0000988b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x988B 10868 bytes
SHA-256: 960277a6a9d37409e4166040eff50edc527bf5176c00ff60d892f6952edaaba4

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