Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b2b8badd153f626…

MALICIOUS

PDF

46.3 KB Created: 2020-10-17 00:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ce8ee5657faebfef20359aecab7bf043 SHA-1: eb4dc45e3b24d22617826d6e029325eb71842d9c SHA-256: 8b2b8badd153f626950b43a578a6478e2958dc6e05c44724eee39bfe7b134ee2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to drive traffic to potentially malicious sites. The presence of many external PDF links suggests an attempt to distribute or redirect users to other content, possibly malicious.

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://gettraff.ru/123?keyword=risk+assessment+and+vulnerability+analysis+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f8775167c325.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f870bf003f52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369152/normal_5f881eba99934.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/1/0433/7182/3262/files/bajar_ingles_sin_barreras_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/the_girl_from_uncle_cast.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1858/2678/files/87155372665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6265/7177/files/throwing_weapons_5e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c38528c-b08f-4486-8879-320f142cad17/musijomaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf7e4915-56b2-4dfa-957b-0f59c51f3086/zupijufolapikulaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/062378c6-0d74-45e2-98fd-e722b9c70aee/jidutolewuwijetidevezu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73c3aab3-05b9-4f74-a5fc-1d45bfc4d51f/50438956303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e66f4d0-62a1-4bc9-93d8-8ed65cafc4c7/72667688682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1024cf6e-f8fb-494b-80e2-c65b7b074ac7/runitenufenovuzatuma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09d74057-1592-40a9-9693-5fc129dba654/english_vocabulary_in_use_advanced_m.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c24a0cd-b809-4c94-95df-9a2a0711d7e4/mobivuxiwiluv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1816/5146/files/muwagigukuzoxob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5018/0001/files/zone_1_police_station_pittsburgh_pa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/999360c8-c03a-4e70-8b0f-66f063041146/35652112677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/746f4aaf-8b3b-4b27-9562-5c7a91c74270/zunemakasejazok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95a63ffc-4d7b-4ed0-81a3-69901113ca4d/20261875591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/581c034d-e140-48df-b710-0a7ccab94326/10614362363.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/833f8ea6-5fa2-4b31-aedd-38fa874c01ab/80234523734.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_off00007534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7534 5560 bytes
SHA-256: bf8db9ef85fb0e3d8f6851e13e139eda308933336d53730113c19ef8061a4709
font_01_sfnt_off0000880c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x880C 10472 bytes
SHA-256: e21018300c9ac398a93af9c213093e4ae563f8b9bd420db0df3674b11cb016b3

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