Malicious PDF — malware analysis report

Static analysis result for SHA-256 44591ff1271e174e…

MALICIOUS

PDF

48.2 KB Created: 2020-10-30 01:16:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-12
MD5: 5b2bbe960502ed8982c2594ac71b1f6b SHA-1: a13a94f5d5dd34ae8a970514693e93b5cde85b8a SHA-256: 44591ff1271e174e75cd7f58d2032c841c24bb983f5f7f18d94a7f7eb228b57f
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, identified as a redirector for SEO-based phishing. The document body, though heavily obfuscated, contains a URL that mirrors the malicious redirector. The ML classifier strongly indicates maliciousness, and the heuristics point to a link farm and redirector strategy.

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://gettraff.ru/wb?keyword=graduation%20ceremony%20speech%20pdf In PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/kogedugutisizo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kavalukato/55923706793.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/search_for_text_in_files_windows_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7227/5103/files/assembly_language_instructions_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/8696/3622/files/20740463547.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9041/4230/files/24792813591.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/adosphere_2_download_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/dye_nt_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/warhammer_40k_astra_militarum_codex_7th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/tebuzola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1136/6309/files/descargar_ppsspp_gold_apk_2020_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/2555/2314/files/luroxawitiviles.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000687f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x687F 5496 bytes
SHA-256: 6ff886ea3ba0dee26a72f58df73d88c170486aed8d46239208f93849ff54f3f2
font_01_sfnt_off00007b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B14 10468 bytes
SHA-256: f4bda93bb167f3b0c80334f040e2e64b03a16e889a5fff174ee21faf6b2e8e26
font_02_sfnt_off00009ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EF5 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953

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