Malicious PDF — malware analysis report

Static analysis result for SHA-256 8072ce2ad80dacc6…

MALICIOUS

PDF

50.2 KB Created: 2020-10-27 13:00:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 318d4aa82876ae0d2224f6bb81e3fed6 SHA-1: 522e167a0ba37288ec686cc5f69491d50e03e399 SHA-256: 8072ce2ad80dacc691637062245a679a62fc77569c358b79560590d85014b9d1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the identified malicious redirector. This suggests the primary purpose is to direct users to malicious sites, likely for phishing or to download further malware.

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/strik?keyword=parasite+english+subtitles+hulu
    • https://cdn-cms.f-static.net/uploads/4413242/normal_5f950c935d5a2.pdf
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f8f537676492.pdf
    • https://cdn-cms.f-static.net/uploads/4380522/normal_5f922b7a72a98.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zaxawetawupo/lopudepifokujozerixawemex.pdf
    • https://s3.amazonaws.com/divexikav/36093454468.pdf
    • https://s3.amazonaws.com/sakaburepagase/41791855616.pdf
    • https://uploads.strikinglycdn.com/files/7c2927ca-fdbe-4b41-b452-e798314bd53a/farikesazetozokapo.pdf
    • https://uploads.strikinglycdn.com/files/068135c4-134d-427e-85ce-04f741537f0c/2841180695.pdf
    • https://uploads.strikinglycdn.com/files/16641d33-3c36-4c6d-ab24-8228a5b514a9/wwe_2k17_karriere_tipps.pdf
    • https://uploads.strikinglycdn.com/files/2ef56aa7-550a-4e6b-97a6-c3ede0c31fb4/gerumafotuxuloz.pdf
    • https://cdn.shopify.com/s/files/1/0268/7277/4850/files/karmic_management_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/5884/6110/files/ib_physics_ia_ideas_easy.pdf
    • https://cdn.shopify.com/s/files/1/0503/4849/0915/files/stadtwerke_mnster_app_android.pdf
    • https://cdn.shopify.com/s/files/1/0479/2775/4908/files/34181656350.pdf
    • https://cdn.shopify.com/s/files/1/0440/6188/4568/files/22999617019.pdf
    • https://cdn.shopify.com/s/files/1/0477/8750/7871/files/online_file_name_editor.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/beziresimafonevodizobek.pdf
    • https://cdn.shopify.com/s/files/1/0268/8208/0956/files/25240536517.pdf
    • https://s3.amazonaws.com/leguvefu/jeretafuvokatulabuvoje.pdf
    • https://s3.amazonaws.com/henghuili-files/zofodixakizodasiju.pdf
    • https://s3.amazonaws.com/wizidimawag/biology_form_4_chapter_1_notes.pdf
    • https://s3.amazonaws.com/kavitokolezub/86554756397.pdf
    • https://s3.amazonaws.com/jamokaroxoj/ratio_analysis_of_insurance_companies.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006da5.bin
ff399f96e4581e0c2d488a47c56fbb932b28e6be7808d32dc13f47bb70440c1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA5 5088 bytes
font_01_sfnt_off00007edf.bin
079f36e8de5a749ff5b18f6bd48fef6d6ab7ccd7a93a1d8b92bc180570b4f26a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EDF 11564 bytes
font_02_sfnt_off0000a5fb.bin
354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5FB 16036 bytes

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