Malicious PDF — malware analysis report

Static analysis result for SHA-256 59330023c078ed4a…

MALICIOUS

PDF

44.6 KB Created: 2020-10-27 20:58:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a78eec265a5a2432bc9bdd8ae682f840 SHA-1: e4849b4bbd63367153db429a934c14650b409482 SHA-256: 59330023c078ed4a34bbf3832e4d366372515322b835db69ebd796beec9638e2
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.club/123?keyword=tn+handgun+permit+manual In PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/zonugase_jibini.pdfIn PDF document text
    • https://ganarusi.weebly.com/uploads/1/3/4/1/134109047/041242853cc55d7.pdfIn PDF document text
    • https://nikoxutaju.weebly.com/uploads/1/3/1/3/131378952/73a25b4b3.pdfIn PDF document text
    • https://jurizimobijagi.weebly.com/uploads/1/3/0/8/130874317/cf87370e8e.pdfIn PDF document text
    • https://waxalema.weebly.com/uploads/1/3/4/3/134364729/xifofigadulal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386337/normal_5f8d8d744ab58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382772/normal_5f8c72b071a6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367281/normal_5f895dc004c82.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/1/0500/7258/4387/files/apunkagames_gta_san_andreas_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8941/9167/files/76360731200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/6280/8742/files/zegutiwavaruwiribu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0906/4090/files/nonutojurorubux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8017/0137/files/conditional_lien_release_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28185c9f-411f-4753-b78b-85be1c1b3c0b/wifidupokiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/624fbcd5-aa5d-414f-aaff-468d9e058063/tedodupetagokibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62656605-90dd-4975-b805-6f2988ee4d91/rarirot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37df3bfb-5634-42e0-b35e-309062075f6e/mifagafonefuziga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4548/5725/files/bible_quiz_questions_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1068/9694/files/xonufurew.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_off00007016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7016 5144 bytes
SHA-256: eac9f667a7befb247fde54816f35db9fed9e2f8f6fe28a0e84799db9368d5a55
font_01_sfnt_off00008165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8165 10528 bytes
SHA-256: fa7875ab75d35c07f1cd87aa8ac12ed5d1f632c33e5ce263812e62b72ce3b9b4

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