Malicious PDF — malware analysis report

Static analysis result for SHA-256 445666a63ca1bfad…

MALICIOUS

PDF

49.4 KB Created: 2020-10-28 20:33:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d30582d8fd94e8630e3d2343139790f9 SHA-1: 3cd0ea66ec078a77135f1fc092c9b78c7074c51f SHA-256: 445666a63ca1bfad4630d4b7267cbef0c30bab2bb4950742a315d4eb1ba9c37c
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and SEO link farming, pointing to a phishing or malware distribution scheme. The primary malicious URL identified is a redirector designed to lead users to potentially harmful content. No scripts were extracted, but the embedded URL itself is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/pify?keyword=d%2526d+mage+enemy In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371495/normal_5f91aaf57aa8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368228/normal_5f8762131ca56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421957/normal_5f9753553560b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365549/normal_5f87011c569b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377377/normal_5f8a68d92699b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac339025-389d-4d9a-b1c4-8dd50dfdec6d/realidades_3_workbook_answers_page_51.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5181/0969/files/peviwu.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/mifivumaruj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a918cc69-8c59-45fb-9a1f-f82c456f3bed/lunemojezadixolakuxazuj.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/14135261748.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/panel_data_analysis_using_eviews.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/pijurenusekanudedukowaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9692/3075/files/linux_mint_mate_installation_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f54e49cf-0197-4d71-bb3b-181fb42ca0f9/ziraxojatekorojomepas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8858/4098/files/setajawifaribevepufej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/485968d4-bae5-4c30-840f-8f5ec0e6113c/mixcraft_8_samples_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0396/9173/files/poulan_pro_self_propelled_lawn_mower_wont_start.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8363/5619/files/many_lives_many_masters.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/rise_and_fall_of_bretton_woods_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0634/0515/files/96982914635.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c7fccd0-747d-4188-a9f6-36b093ca0577/87045042389.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5515/3303/files/gynecology_and_obstetrics.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/business_english_lesson_plans_upper_intermediate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/4047/8629/files/rovigawilidub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4535/6198/files/pazivuzuvorivesitusa.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_off00008647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8647 4156 bytes
SHA-256: 5bcf7f318894cd8667f709bf970fa8c582a8027402ea75fdf14ac0e15260a4d2
font_01_sfnt_off00009475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9475 10540 bytes
SHA-256: 51aaa1895673d217fa14d8b6f85fa98bea541d86d6cbcebfce803cd72f5ea9d7