Malicious PDF — malware analysis report

Static analysis result for SHA-256 07bbc66362910ef0…

MALICIOUS

PDF

39.9 KB Created: 2020-11-04 17:34:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fcd94772fb81e8d6f106dfd5e801de8 SHA-1: 7696a672eb5a0123f453489079750e233bf893c8 SHA-256: 07bbc66362910ef0f5a6bfe38460d0a096f5fa7728f22f323d15931f6982e2f2
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by an ML classifier and contains a link to a known malicious redirector. The embedded URL, 'https://cctraff.ru/123?keyword=anime+fighting+simulator+wiki+fruits', is the primary indicator of malicious intent, likely serving as a lure for further malicious activity. No scripts were extracted, and the document body was heavily obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://cctraff.ru/123?keyword=anime+fighting+simulator+wiki+fruits
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wizedumi/nutimekowedofudopisonogi.pdf
    • https://uploads.strikinglycdn.com/files/51fe47a6-521b-47be-aeaf-342b7a97cfb8/luvukipidavadaviva.pdf
    • https://uploads.strikinglycdn.com/files/f13ecf01-8cbb-43a5-b72d-185e8cd86df4/lumamanusufisojerafafu.pdf
    • https://s3.amazonaws.com/vopadofugon/car_residential_lease_agreement.pdf
    • https://s3.amazonaws.com/xoxaneral/math_ia_exemplars.pdf
    • https://s3.amazonaws.com/penale/zopufefozisuzaloxakepu.pdf
    • https://s3.amazonaws.com/mawesenasijoser/farmingdale_elementary_school.pdf
    • https://s3.amazonaws.com/forupokisip/95803693679.pdf
    • https://uploads.strikinglycdn.com/files/93547d78-7b67-4d71-a54b-9855f52d2d5e/15541177946.pdf
    • https://s3.amazonaws.com/tazibabebamep/dragon_ball_z_episode_292.pdf
    • https://s3.amazonaws.com/jamokaroxoj/94657770763.pdf
    • https://s3.amazonaws.com/bugutaj/nirafiforakenorerimu.pdf
    • https://uploads.strikinglycdn.com/files/7c0ebfe3-6912-47e7-a1ec-0b65e303e124/25839184695.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d24.bin
885ca9711f3c143004744df8ddc9093ca8f18c2e8c245cd9e6cc3aa2986a0384		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D24 5328 bytes
font_01_sfnt_off00006f2f.bin
f13b59032569a5ec4e054620b5e6185ebbd07322ff54acb622cfa7579d75152d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2F 10436 bytes

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