Malicious PDF — malware analysis report

Static analysis result for SHA-256 63f817ea2473fc35…

MALICIOUS

PDF

42.4 KB Created: 2020-10-26 01:16:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1e472e3e21cc11d946f2720db4ed246f SHA-1: 297f321e8d4525492d9b77bdf4cf49606f9fc946 SHA-256: 63f817ea2473fc3551b989fe3a003e2588cfb826cc36aac6799a0043fd051afc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious due to its inclusion of links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to a hymnal PDF and a URL that likely serves as a lure. The presence of numerous external PDF links suggests a link farm or SEO poisoning tactic to distribute malicious content.

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=great+is+thy+faithfulness+hymnal+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f89508553c1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374699/normal_5f9506175dff2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371004/normal_5f8842efcb440.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368950/normal_5f8c036c64f5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367941/normal_5f8c67bcac0fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f8be5cccd443.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377678/normal_5f8b9cb7d68bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374545/normal_5f9129535550c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375076/normal_5f8e7a46b7fe6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369183/normal_5f8d430d1634c.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/1/0440/4484/5206/files/66049731191.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1208/8231/files/classical_musical_instruments_pics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5066/2053/files/78402743000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5482/0247/files/kesuputuvotarofokubegosuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4782/9156/files/9753400111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5404/6618/files/ssc_stenographer_notification_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7847/8743/files/austin_healey_3000_for_sale_usa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2960/8628/files/47176068090.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6250/4855/files/xoturapezefuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5423/8369/files/xavius_healer_guide.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_off00006427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6427 5416 bytes
SHA-256: 7d8291d09a75e42e2918f096c51ed4d6014e3f43a12e6a2e1720336a0846a8cc
font_01_sfnt_off00007671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7671 11092 bytes
SHA-256: cd7decc34114a5823823fc062066c4b22202a134dc2621fb75ebf3a3492b1176

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