Malicious PDF — malware analysis report

Static analysis result for SHA-256 501c4207d499733e…

MALICIOUS

PDF

40.5 KB Created: 2020-10-29 10:45:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-28
MD5: 4971e98ed8893047dd25305c64228b96 SHA-1: e539a3c2dcbc53aef5ae7eca37cb8755989ca62f SHA-256: 501c4207d499733eb943680719564614dafe8ec90a711881fed006e8e21ebfd3
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to potentially malicious redirector infrastructure, as indicated by the PDF_SEO_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK heuristics. The primary malicious URL identified is https://cctraff.ru/pify?keyword=mcs+3233+stereo+receiver+manual, which is likely used to funnel victims to further malicious content. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=mcs+3233+stereo+receiver+manual In PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/xivutimumarumanede.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409614/normal_5f960f2d22cc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373749/normal_5f8eecb42b94c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371809/normal_5f8fe3c3e7c58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368731/normal_5f9892df4f370.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383929/normal_5f8bca42bbb5e.pdfIn PDF document text
    • https://solejibanumiro.weebly.com/uploads/1/3/4/4/134489880/1afc3d0297f.pdfIn PDF document text
    • https://zavamemedu.weebly.com/uploads/1/3/4/3/134305249/3f788ea45881f07.pdfIn PDF document text
    • https://romovemesokawaj.weebly.com/uploads/1/3/4/4/134479736/9893084.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383308/normal_5f8bc9c66ae4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410186/normal_5f934335d50b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388169/normal_5f8ddeaa709e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382004/normal_5f8b97b832f85.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/1/0266/9681/0672/files/47567844474.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6618/2820/files/area_code_304_zip_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6716/5860/files/flight_radar_24_pro_apk_cracked_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5839/5843/files/share_it_for_android_2.0.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90b86623-77d9-4de9-a8ee-bf1c803e4793/37119684921.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2199/2599/files/jumevajob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4323c4d8-9ed5-400a-87de-b09181280b19/fefen.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_off00005cc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC4 5304 bytes
SHA-256: e074b9bdb985d1917d95e47fe674674cc1f58a388d05a4f5ba3bc503702af967
font_01_sfnt_off00006ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC5 11176 bytes
SHA-256: b2fe02f1843c5397d490a22b0434ac09e313c3d799d04092986cc546c4e8fb92

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