Malicious PDF — malware analysis report

Static analysis result for SHA-256 af6d2b2f57f527a8…

MALICIOUS

PDF

44.4 KB Created: 2020-10-29 11:30:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 2b228d8355d7e0d3f0e1e1e5ddeab059 SHA-1: de7afa781967b6a2cdc24630958876333db17ffc SHA-256: af6d2b2f57f527a86b01e4aa0c3718950ea2a359bbfbdad5d411503ccccf27cd
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=what+is+indie+music In PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/jobag.pdfIn PDF document text
    • https://mivoxoxez.weebly.com/uploads/1/3/4/3/134340481/9674157.pdfIn 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/1/0504/7992/3365/files/aruba_620_controller_user_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1984d79-5e56-4569-a261-6063510f1ef7/88248961926.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8b5af87-a78b-453a-a2b8-910caf9dee7e/bovifaweregolunopadumufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42ae7f67-cb24-46ab-a828-378066807d7f/52447237017.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/86336748731.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/3151/5295/files/baby_snow_boots_size_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3af2945-a0cd-4ad4-95f1-ad367a760e80/pokemon_5th_movie_full_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fa878bf-62fb-4da3-b7ad-3b08d7a0647a/36661767871.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8abb4207-ca93-494e-8eea-9e83f4219ba8/bizagirosojidevefutiwomun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1406f533-2eda-4985-b772-8a0ba8ee6314/44954366715.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c26bdceb-f04e-4d25-ad11-39f5fa3e981f/12524866536.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b0b5d8b-0a16-44b2-9bee-4ac6831e028f/wilifoter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7568c091-617b-4d44-881d-861617cf1927/37795255933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64426ce0-28d5-4cf8-a36b-4edb16d4b8a7/goworikomixojizulisop.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/32409768818.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/bosch_spare_parts_catalogue.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/659fcf87-c388-4be0-9f51-2eaff075bb67/torajigu.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/class_11_biology_book_in_bengali.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/83590473664.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_off000070fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70FB 5064 bytes
SHA-256: eca8b0967dc45cbdac4cb4234ce454ad8c90b559b353c05b6042ea624571ffe3
font_01_sfnt_off0000821e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x821E 10012 bytes
SHA-256: 65abfa5c16ca6a9a65815a6bb06b14a5a39b2abfa2cc70f83141a5cc31de86a8

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