Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdccc20f1ff4863f…

MALICIOUS

PDF

45.4 KB Created: 2020-10-28 00:14:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 906d4e2678b61feb50d14cb2b0a3ee91 SHA-1: d13f05f423cfbe168c5b925cba02e862a987bf35 SHA-256: cdccc20f1ff4863fa394aa0a05cf27ea511ff6e8ca2626475298672c7e9808ee
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the document body contains a URL that is likely the primary payload delivery mechanism.

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=vietnam+war+conditions In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/90334779634.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/neoplasia_intraepitelial_cervical_grado_1.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/nalifanoxuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8392/6171/files/86169268636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5634/0890/files/lifebikolezidobekomedebux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8935/4142/files/6838538952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/0623/2229/files/kuwegimis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/1672/7971/files/wumotekifukugidinopixina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/714a0a86-0771-4840-9d8c-276edc73bbd7/59687469389.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bb4524b-5b8f-46c5-af96-09fbd8cf26e8/12990554918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/8573/3528/files/22295538101.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/9807/6842/files/world_history_since_1500_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3512/1605/files/92865250289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/7756/7132/files/28270255925.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6332/6358/files/veracrypt_container_ffnen_android.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/darimavibotasorokadodufez.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/dawisowiluzokezejo.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/calendar_aptitude_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/english_grammar_tenses_book_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/anatomy_and_physiology_of_eye_ak_khurana_download.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/78268708258.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_off00007222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7222 5108 bytes
SHA-256: 7c34eb2f48496002f8bb49acf54ab795a7107469dc4182ebde07bdcaf9536ce0
font_01_sfnt_off00008377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8377 10960 bytes
SHA-256: 415d7121ed7c5c0b1e20b44a899715c5e29baf3e3c18d52f9ea4c9d4d4bca793

Open this report in the interactive analyzer, or submit your own file for analysis.