Malicious PDF — malware analysis report

Static analysis result for SHA-256 445d7b4de8a1fcbe…

MALICIOUS

PDF

40.7 KB Created: 2020-10-23 21:39:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-12
MD5: 1c41d06ebdf88edfc6dabd72773c15fb SHA-1: 2f956401ce307642337509fae3e894e758f76457 SHA-256: 445d7b4de8a1fcbe4af420c86136e6b87311b58cb3f8fc30a3da77d3d1360887
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service identified as malicious. The document body, though heavily obfuscated, contains the URL 'https://cctraff.ru/wb?keyword=mental%20math%20for%20grade%203%20pdf', which is flagged as a malicious redirector. This suggests the document is part of a phishing or scam campaign designed to lead users to harmful websites.

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://cctraff.ru/wb?keyword=mental%20math%20for%20grade%203%20pdf In PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/eaff109ab94007.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/5223067.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/98f4ac25-d9dd-46e4-a4af-0875400474ec/liwipexasobakujugefisixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56272cdc-20e4-48f7-b5d6-7c5f9ac95d9b/86331446509.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3b928ce-4383-4d0d-bc1f-a3514206415b/how_to_make_meth_pipes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6d2b8f7-f59a-4ab8-a6e4-87d4d4ef6306/vokizefowubokubipifofel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59a7d4af-1eae-43c2-b2f8-705ba33544f6/13548130023.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb80fb72-9fbf-4465-a072-4d898066f761/ministracion_de_medicamentos_pediatricos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/4080/2469/files/51349721328.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6828/4316/files/58846242961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3624/4643/files/find_my_android_device_using_google_account.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/1_samuel_28_nlt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/9366/8255/files/using_a_pendulum_with_tarot_cards.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7260/9686/files/83751007639.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9597/6856/files/medical_terminology_chapter_10_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/9918/5312/files/48997694779.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7121/2193/files/bigo_live_hack_diamond_apk_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3427/4723/files/juxakorofuwaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/taximibexibevaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/8962/3747/files/types_of_graphs_in_statistics_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5176/2343/files/gestion_ambiental_en_mexico.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_off00006058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6058 5448 bytes
SHA-256: bb6fbf2c8ad6f0ffe72651ce5b3c575d79717d4c21787ca7bb1ae9117af23d95
font_01_sfnt_off000072ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72CA 10248 bytes
SHA-256: a97f11f08d74089973522bea323833b101641192247a5acf0067a66b9654340b