Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea49cdf9c7e0ab2…

MALICIOUS

PDF

41.9 KB Created: 2020-10-14 18:19:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6833804481e7107c0ae14f561e44177a SHA-1: 5250fb83735a6e79cc35dae7e9fd6efb1d1ad615 SHA-256: aea49cdf9c7e0ab24f0e28c24fc01dd29350b85db9004000320386169cbd7fd4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which are SEO-optimized PDF documents hosted on various platforms. One of these links, 'https://ggtraff.ru/pify?keyword=heat+stroke+nhs+guidelines', is identified as a known malicious redirector. This suggests an attempt to direct users to malicious infrastructure, likely for phishing or malware distribution.

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/pify?keyword=heat+stroke+nhs+guidelines In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366024/normal_5f86f66d5652a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f87050f53820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f870a9bf20f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5f86fc62d4ea6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f8707d537005.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365608/normal_5f8702731d567.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_5f87163e365f8.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/1/0431/1734/6965/files/tires_plus_lakeland_fl_33813.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3880/4648/files/74173373117.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8765/8150/files/63330463574.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3083/1253/files/948019481.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1624/0807/files/the_league_of_nations_was_successful_at_preventing_global_conflict.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24e9bf17-2931-4e21-beb6-9da04374f6d3/jitivexixazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d828fa87-f982-42cb-aa15-3fdee3faf750/zuwafajivizewufesufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee110bee-8739-49f1-b014-f102144349b8/gobuxepijuzas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aa11230-9b35-4c7e-a3e3-8b1ea7e09310/sakigixogujarabido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c84d4552-9318-45ce-bdf2-f5d7272389c0/samut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff6585dd-0465-46a0-a698-d3cf41d810d8/43898406525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bb70ab0-326a-4763-a02b-63d34e13bfd0/xukagiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a93bb41-22c2-488c-a7f3-3fa2f822ad72/83574075909.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/220ac33a-8053-4ba3-8418-31ccc4bc7071/womozivezugulo.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_off000066cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66CB 5112 bytes
SHA-256: fe8288fb656c64ffaacbe4245a6bdf363af2c153c740907bf9d0a7186be8b593
font_01_sfnt_off0000781e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x781E 10108 bytes
SHA-256: 8eb8e13a80b399bd3397eda5348d6561b95c0b2976a08e4d60076e10200c2a77

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