Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4bd06089e3e0b40…

MALICIOUS

PDF

38.2 KB Created: 2020-10-25 20:17:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 726bfca3284aaa04abe34db80ec58dc7 SHA-1: 3bd92cea73415ad14c786834630c5123bf2c50ba SHA-256: e4bd06089e3e0b401aa7305568ac8565b27708a70bf78967da3f8bc485e82c94
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector infrastructure. The primary malicious URL identified is https://ggtraff.ru/aws?keyword=witches+spell+a+day+almanac+2019+pdf, which is flagged as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into visiting it. The ML classifier strongly indicates maliciousness.

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://ggtraff.ru/aws?keyword=witches+spell+a+day+almanac+2019+pdf In PDF document text
    • https://jizonuwuko.weebly.com/uploads/1/3/0/8/130814311/7fec12cfd.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/texodobokijobajoxewe.pdfIn PDF document text
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/5c16512096954b9.pdfIn PDF document text
    • https://jomunibudax.weebly.com/uploads/1/3/4/3/134342604/4008214.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/1/0482/8777/6932/files/74142016167.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7789/3270/files/lotus_materia_medica_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8714/8696/files/31139748318.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/25412325289.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/business_environment_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/entrepreneurship_development_and_youth_empowerment_in_nigeria.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/anthropology_study_material_for_upsc.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/21408687373.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/practical_english_usage_by_michael_swan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9436acfb-63bb-4346-8cc7-3edd9b678ebc/zolev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7653834-5530-4d9f-8e18-39a8855446eb/9223297172.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a143fa7f-856f-46c0-b6cd-f5c6df5880f7/mowumuruzonekuzenonaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/770bd47a-3196-4f9c-b9ff-07f005cebf5c/70852438501.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35ae22f7-fc4f-4ca0-9002-a40f05656cf8/4205830604.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54a8b60d-3bbe-4b5f-9208-2aeece5d2faa/95941470785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6cf1d24-f6bd-4487-a2d4-8cf0bb9bad94/92903288901.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_off0000494a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x494A 5572 bytes
SHA-256: 9330deb0b352ff2205e79880620a76422ac0b4522a0ae184758020a19e9d5d19
font_01_sfnt_off00005c30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C30 9676 bytes
SHA-256: 57df26fd606e3b0ab3b6fdb95633176252de88636eb9d6af2f91a21e9945639d
font_02_sfnt_off00007d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4E 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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