Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d47c8fcd15e3aca…

MALICIOUS

PDF

35.6 KB Created: 2020-10-27 23:24:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 84c5d5ba36c9c2a7943add88a747b0e7 SHA-1: 1e3f915b29b69bcfece5ce9db37919725d7b8c9c SHA-256: 8d47c8fcd15e3acab6fef67303d177d180e6a9eb4528cfdb6c761751efda4174
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links designed to redirect users to malicious websites, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics. The document body, though heavily obfuscated, contains URLs that are part of this link farm. The primary goal appears to be directing users to potentially harmful content through a deceptive link structure.

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://cctraff.ru/123?keyword=the+jungle+book+soundtrack+vinyl In PDF document text
    • https://soremezu.weebly.com/uploads/1/3/1/0/131070226/fakagodose-pojakowugu-godatuxanus.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/govorikepudago-gixidawele-wawep-xoxebilepadevu.pdfIn PDF document text
    • https://jikiwifapa.weebly.com/uploads/1/3/4/3/134338998/xuzojowagutoxafexefu.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/5987177.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f96408b2a685.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367923/normal_5f961ac5d078c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374519/normal_5f8a46ab93573.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383572/normal_5f8ee92c6e93b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382771/normal_5f9748861fd2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_5f874d9263e99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393349/normal_5f95f21b16500.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408721/normal_5f94fff00729d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371809/normal_5f8eaf28eac19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368740/normal_5f8dd48d47f3d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0212/6755/files/haswell_4770k_overclocking_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2536/6165/files/zexumekamexomazotemoje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8488/1301/files/sivonebafokadudesobur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85ee366c-73f2-4e35-9188-8a8196154c7f/zusexopuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/199588cb-ad8e-445a-93b4-354dd2d3c433/8282335087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e337f42f-37c4-4600-bc50-5b2cd8789c89/63028293561.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_off00004b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B6D 5592 bytes
SHA-256: 8a9074924c0e1531e7efae5a6dac01e3a487468112499bdf6cf7481e31d27b6d
font_01_sfnt_off00005e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E6A 10348 bytes
SHA-256: fc2ce50e7f75bbead1c3452eea2da970a26091fd3d70d143a8d50bbdfadef371

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