Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3d719f17547e979…

MALICIOUS

PDF

36.3 KB Created: 2020-10-25 20:25:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 6958a4c7f20b2415c7ba310f12a206f4 SHA-1: b1ff5d7467991ee4c9eac06a4d5534ecf7b9d742 SHA-256: f3d719f17547e9799d749df24f329618912323fb27fa79c595cd74a64cded1a2
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ggtraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on 'strikinglycdn.com', indicates a potential link farm or SEO manipulation tactic to distribute the malicious PDF. No scripts were extracted, but the overall structure and URL suggest a phishing or redirection attempt.

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=pasar+de+pdf+a+word+online+gratis+espa%25C3%25B1ol In PDF document text
    • https://biwugina.weebly.com/uploads/1/3/1/1/131163984/4340692.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/7127524.pdfIn PDF document text
    • https://meboguvogo.weebly.com/uploads/1/3/1/4/131437667/d53d4c02.pdfIn PDF document text
    • https://gibitiwatu.weebly.com/uploads/1/3/0/7/130776060/gubafulajowasirafini.pdfIn PDF document text
    • https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/1255092.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/43fa450a-31fa-4757-b390-12788a6c686a/74818348703.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29400cef-5f27-451f-af5c-293c816e26e8/zobizedowakobef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/590aae1d-f3de-42f2-8fa0-dccf98423297/16601781765.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22a94748-bc09-475e-bb3c-6d953268beb3/81413803334.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cc0da46-c9f5-4a01-9983-da4c03d05594/xevijajulonojiti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ccf75a8-03e6-47b2-a2b7-cc62cb81c6a6/26810032756.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/4791/6997/files/bozeman_science_molecules_of_life_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1114/5365/files/mega_clean_detox_drink_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4449/4750/files/furikikopowijezelotez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1731/2152/files/26900354423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0193/2706/files/56570338588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f23276dc-5aa4-4a29-bf97-49f362c7e898/23350100323.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56d417a1-93ba-4186-b40b-e360a37ffc2a/68561426453.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dd1a2ae-af8f-4102-8054-1f2c5a30b75b/soriwefuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c06df56-6d2d-4d17-870a-c07930a20592/lusisivaluf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdd6839b-e0db-4d3e-a37e-bc3e657d3622/nikola_tesla_corriente_alterna.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_off00004e86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E86 5516 bytes
SHA-256: eda3c50364c7a893d2706c680947efa167e86ccb0afeb5dba6823d781d7dcc8a
font_01_sfnt_off00006121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6121 9508 bytes
SHA-256: 2178d2ec7a07099943e8e49a7376fa97497d39380ce0be734d2f68fea8337001

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