Malicious PDF — malware analysis report

Static analysis result for SHA-256 24618fbf6d7dfe85…

MALICIOUS

PDF

43.2 KB Created: 2020-10-05 02:19:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a8c6b74007cbe11f5df6f72b6a8083bb SHA-1: f14c6f7507469c093df560471bb86178fa6be5b4 SHA-256: 24618fbf6d7dfe85dfa546eb779c6e3b33eb480dbd38bd3d0ae8d7d01c474c31
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://cctraff.ru/pify?keyword=damned+human+race+essay', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure the user to malicious infrastructure. The presence of numerous other PDF links further indicates a link farm or redirection strategy.

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=damned+human+race+essay In PDF document text
    • http://files.feralaffairs.org/uploads/1/3/1/4/131438216/vodikufoluzewidekog.pdfIn PDF document text
    • http://napaluje.sieglindemcgee.com/uploads/1/3/1/4/131407836/teteworazebinu.pdfIn PDF document text
    • http://files.alpacapines.com/uploads/1/3/1/1/131164552/5123424.pdfIn PDF document text
    • http://files.guyinspired.com/uploads/1/3/2/6/132682966/sijepumiv_xukogoruka_xobanorokonulod.pdfIn PDF document text
    • http://vorase.cstshoponline.com/uploads/1/3/1/4/131406109/3380321.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/37cd6e20-7c88-4fd2-af21-298709d4805c/24998869203.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/812548bb-f25c-4f10-a298-7b2b28dc5b9f/88943073118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30285516-4c4d-4267-90d6-b1fa11a01a00/36536966628.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08f3bcfd-66a2-4f76-b3a1-bd4c422d5da3/55416341969.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16206e18-9401-4b99-9de6-e28884e20542/xonatunexamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3880/4648/files/chick_fil_a_uniform_size_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2835/1640/files/12291783153.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0470/5989/4440/files/centrum_flavor_burst_tropical_fruit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/8824/9757/files/nekogopojafivijar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac1be3df-4c4f-4cc0-9e49-312dbfd95751/84940263259.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e51ef6de-7ec6-45f8-81a9-3f9af732a926/81611129942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01ef3dc1-cd24-4512-b0f9-5d3eb2114540/sorizotosonowobalukozobal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64b1639d-c01b-4d0a-b404-8006a637fb17/88238225015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/defcea47-e5e3-4e0e-8ff8-24b8794c2229/jokopaxe.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_off00006ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA4 5248 bytes
SHA-256: 3db6a2938d5ec374a090986ac3659fadc6c1cf92657e6ae12a8fd605cb9b6acd
font_01_sfnt_off00007e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E5A 9936 bytes
SHA-256: a1c14ef575962174a332cb8ab4e238a16e0f740a89a0691675376e9f1518630a

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