Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d9fcd92483d591…

MALICIOUS

PDF

46.7 KB Created: 2020-10-31 18:02:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 485bd82a7c25d9ba065f643f8464cb05 SHA-1: d7a33d4489146c0daa45d723b12355724754d1d1 SHA-256: 62d9fcd92483d59158029497600b0503883adac058055901a5a1754d691dcfab
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.club/123?keyword=maniac+mansion+nes+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_5f888af640680.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5f93f860f23c4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wofaxil/ap_calculus_bc_lecture_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47caea18-2bbc-49db-8988-81baf442a1fa/dopabojowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/5319/2630/files/12394448281.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80d78bb0-9d7f-4bbe-a2a9-f3997bfaefd9/31441119261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/529cfd7a-45b0-4859-8645-af096f3356d7/72263168209.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8bbc01c-4f40-4355-a8a3-662b7c6f143f/patriotic_order_sons_of_america_washington_camp_422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba798e7b-d117-4b16-9948-49acfcc0191a/41079739283.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/free_to_word_converter_download_softonic.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/branches_of_physical_geography.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7149/9157/files/jewufezalanunad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca9971b2-232a-44aa-af3d-229407d397f2/desfile_de_luces_salinas_ca.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c658d20a-d007-4793-8608-10bd8907382b/divine_name_king_james_bible_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af832da6-9298-426c-955d-48fdbf02cbb4/panonitexined.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B2D 4656 bytes
SHA-256: ca7ea6d45f33c544341565a821de0a474137c23f2b8e0119e6f14db6a161371e
font_01_sfnt_off00007add.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADD 10808 bytes
SHA-256: aa8d930e1737d26ca95bed535243f013c31884432390f9e1e9fcf0a5671e74c8
font_02_sfnt_off00009fe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FE2 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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