Malicious PDF — malware analysis report

Static analysis result for SHA-256 701e2dd8e6bf0381…

MALICIOUS

PDF

46.7 KB Created: 2020-10-29 23:47:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 178ccfe14d1589f86d4feabfd60278d3 SHA-1: 36d9a2df79f7da31f76d8fa4a66db77d862a5e91 SHA-256: 701e2dd8e6bf0381af002450fabc1a4185c5de832557ec0f437cfe5cef47a557
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a strong indicator of malicious intent. The document body, though heavily obfuscated, contains text related to 'Omegle not working on chrome' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous other PDF links, many pointing to benign content, suggests a link farm or SEO poisoning tactic to mask the 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://ttraff.com/123?keyword=omegle+not+working+on+chrome In PDF document text
    • https://cdn-cms.f-static.net/uploads/4402737/normal_5f938cf4b03ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379726/normal_5f911c3e6458b.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/1/0440/2341/4942/files/dmv_written_test_handbook_ca.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1789/0715/files/15255989547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/030866e9-2656-4c3c-8867-3031dd62dde3/19644351698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a00fa70-2c8c-49a6-b6df-ac4ae74163c9/84127304176.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5650/3205/files/37608091269.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9631/9148/files/rutomozapurapudela.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8879/6575/files/58742860803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0605/3533/files/gifewazapudajega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3889/1419/files/god_of_all_comfort_kjv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76a74373-1d8c-4cf2-8757-551ca9a83d2f/devdas_turkce_dublaj_full_izle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/7025/7828/files/malayalam_kambi_kathakal_aniyathi.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_off00006a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7F 4796 bytes
SHA-256: cffb9945244a883d27d6bc88c8f892564a7766502f76ff95c971e7c1b9f413d8
font_01_sfnt_off00007ab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB1 10908 bytes
SHA-256: a40666361be1ab4374d3e08bcbac74084c2500c92f5d1c84b4c65d292fb9abad
font_02_sfnt_off00009fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FBB 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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