Malicious PDF — malware analysis report

Static analysis result for SHA-256 5818456444e2fee8…

MALICIOUS

PDF

43.1 KB Created: 2020-10-08 10:45:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4bd5d802560454cfc7afd739dc7a310a SHA-1: 60af9cf5358e924f61a09d0ae4a400a33020c5e6 SHA-256: 5818456444e2fee8c1d367831917b9789f171b521d26cfa0ce31ed5178ba46a1
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, a common tactic for SEO link farms and phishing campaigns. One of the embedded URLs, https://ggtraff.ru/strik?keyword=gx2setgpufence+skip%2528+hack%2529, is flagged as a known malicious redirector. The document's structure and the presence of numerous links suggest an attempt to lure users to malicious sites, potentially for malware distribution or credential harvesting.

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/strik?keyword=gx2setgpufence+skip%2528+hack%2529 In PDF document text
    • http://files.movingmemorycompany.com/uploads/1/3/1/4/131407918/4666431.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/3567dee7-ad59-4f98-b423-6c507f0e03e1/3034840861.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd9399b3-e82d-4770-9805-acb2fd7f8ddb/40748117386.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3faa7c6b-653c-4ad4-b588-75b8c53bb6e6/94666806864.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/551e56cf-0780-42d9-9b33-0075350866a0/32319126584.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d3a40e0-7310-4c64-9a8f-1db67fee0b74/70347377121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/9552/3227/files/5e_bounty_hunter_class.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4783/6058/files/referiwizoloriwarax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7934/6592/files/50406622883.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/1172/3431/files/declaration_of_independence_grievances_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4132/3170/files/13415022271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1048/2588/files/vesigubazob.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_off0000691b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x691B 5600 bytes
SHA-256: 9dcc7665239aa97d32d5cab0d86bd147754c3ac5457d793791c4a1038d7a3020
font_01_sfnt_off00007c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C58 10372 bytes
SHA-256: bfdeb8bd512a52df2843cc398e93bad8b4d8daf2c4fc29ed560a657437050ae0

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