Malicious PDF — malware analysis report

Static analysis result for SHA-256 617bb13dfecc1fb6…

MALICIOUS

PDF

48.2 KB Created: 2020-10-28 04:21:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: da60e1c2811cbd188db7467a08e2e07e SHA-1: 80bd751ee5a64137ebc2a2254704cf86737bed69 SHA-256: 617bb13dfecc1fb6f2dff9667b639badb1be694940dd61022e8e8fb9da42e200
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious link, 'https://ttraff.me/123?keyword=popping+dance+moves', is designed to lead users to potentially harmful content. The ML classifier strongly indicated maliciousness, and the presence of numerous links suggests a link farm or SEO poisoning tactic.

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://ttraff.me/123?keyword=popping+dance+moves In 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/1/0434/1746/9086/files/comunicaci_c3_b3n_intercultural_center.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6344/3101/files/writers_choice_grammar_practice_workbook_grade_11_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1222/6206/files/33115766072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3624/4643/files/chess_books_for_beginners_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2671/0169/files/zunavoni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2428/3296/files/wawoniburosixefewaluxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/1134/2242/files/jikip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/taeyang_eyes_nose_lips_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7081/8970/files/digimon_story_cyber_sleuth_hackers_memory_digivolution_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/8654/3546/files/technical_support_interview_questions_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4430/7098/files/meade_county_high_school_nti_hub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/1973/6516/files/beridenujedelaxujewabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4612/6247/files/pandoras_box_short_story.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3846/6467/files/appsc_group_2_prelims_syllabus.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_off00007c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C67 5328 bytes
SHA-256: b0ce766ea33e54392a92083b3be38f45d2a589d5da6cc2f578a199e2d65c244d
font_01_sfnt_off00008e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E78 10888 bytes
SHA-256: 59a74356439a613a50f44ab7092a23faa5b6d1d2135c46cf98e87795618a00b2

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