Malicious PDF — malware analysis report

Static analysis result for SHA-256 648bee28d503dbe3…

MALICIOUS

PDF

37.9 KB Created: 2020-08-11 06:53:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 79a5d49bba4d11829c9cf89426d231bb SHA-1: d4b73ec55a29f6162ae664fe33301d8f5a825b61 SHA-256: 648bee28d503dbe3aca197c3be3d7bdc9725ec7f51014eb44f8a714c60f2c6ab
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, many of which point to a redirector service (ttraff.cc) that is known to host malicious content. The document body and heuristics indicate a link farm designed to trick users into downloading files, likely as part of a phishing or malware distribution scheme. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=cachecol+vermelho+livro+pdf+gratis In PDF document text
    • http://files.pixiechickproductions.com/uploads/1/3/1/1/131163872/5349401.pdfIn PDF document text
    • http://xobog.perthtamilchurch.com/uploads/1/3/0/7/130775997/lologaduwo-lunomugadelox-sitoxoxedile.pdfIn PDF document text
    • http://files.elawr.org/uploads/1/3/2/6/132695574/dupabotab.pdfIn PDF document text
    • http://files.emptygallery.org/uploads/1/3/1/0/131070407/9be255d6eb93.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/1/0433/4646/0830/files/foragelemokakowekomuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/sesezibaxojagizanurewumel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/mymahdi_mp3_player_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2568/6951/files/55305843802.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6149/1352/files/55726086269.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5225/3863/files/27541579499.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2717/6344/files/40383197985.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7330/5762/files/27572184984.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9724/2262/files/elicitation_and_collaboration.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1945/3095/files/94363685267.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6565103434.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5161 5532 bytes
SHA-256: fb633ef182450850923ccd495ddedd8064638998fa5f4a0c6f8579cd55beaa4e
font_01_sfnt_off00006415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6415 12404 bytes
SHA-256: 6aa25294f262c189ba57837fd8bfae0d12b0611d1ab5c77523305f1cda45b105

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