Malicious PDF — malware analysis report

Static analysis result for SHA-256 4563c483497be428…

MALICIOUS

PDF

50.0 KB Created: 2020-10-30 19:00:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d90b7d4b83467182d378973c19da3258 SHA-1: 1a75e53de694f0f3610e1c72abde161900239435 SHA-256: 4563c483497be4289f2bdf2c0e134127a5ce03c88ffe5d355fa0666dc4446709
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains numerous embedded links. Several of these links point to known malicious redirector infrastructure or are part of a link farm designed to distribute content. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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://gettraff.ru/pify?keyword=solve+partial+differential+in+matlab In PDF document text
    • https://naxesitigas.weebly.com/uploads/1/3/0/7/130740165/merarexukokoxopi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385859/normal_5f8cf11505a67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369660/normal_5f977d27a762a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372104/normal_5f88cdf40354c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383467/normal_5f9302590b5df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379984/normal_5f8c05e338375.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385850/normal_5f8f24d49bf9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381962/normal_5f8fb2b74c6d1.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://uploads.strikinglycdn.com/files/f02c87d0-c207-46df-99a7-0825306a13ad/67919483596.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/4047/8629/files/animal_crossing_pocket_camp_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6d3a99d-f713-478e-8efb-5cca70adc0a1/bavuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8783/2256/files/79972227517.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faa0b941-bbc9-4be0-86dc-6585430707ab/dotez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbd3217a-5e09-489e-a356-6e152282ab5b/64135890385.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec92a76f-8f38-401f-9136-c21b788a77ab/52106864907.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0448/6055/files/dizexuwefisuli.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_off0000727c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x727C 5100 bytes
SHA-256: 046bc554491922108c84d8817a7a0493446e92ab20a665b44cd19347ec44cf85
font_01_sfnt_off000083b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83B2 12048 bytes
SHA-256: c847a75380b1dbca78bb2e44164935ae53dec59cf3c0f6fb4cdc398480fa2beb
font_02_sfnt_off0000ad13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD13 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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