Malicious PDF — malware analysis report

Static analysis result for SHA-256 3807505b13b6649f…

MALICIOUS

PDF

43.8 KB Created: 2020-08-21 22:18:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e1ad61a99651257d9b784d946530daa1 SHA-1: fc67623cf0cb5457d5a90107e9b4b9499a74e6fd SHA-256: 3807505b13b6649fe1f45426af1c92ad2e93295f549e092a873666cc3e0fd31a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=krusty+krab+theme+recorder+sheet+music, which is flagged as malicious. This suggests the PDF is designed to redirect users to malicious infrastructure, likely for phishing or malware delivery. No scripts were extracted from this sample.

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.com/pify?keyword=krusty+krab+theme+recorder+sheet+music In PDF document text
    • http://files.resosurdite.com/uploads/1/3/1/4/131408788/bujelimi_vagoxizerat_zowunusuzabose_nufuju.pdfIn PDF document text
    • http://files.mywaterfrontteam.com/uploads/1/3/2/6/132695560/zexekedamuxopa_muzonojabupor_musokete.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/1/0429/1058/0903/files/20566230371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7193/8453/files/84357299236.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5468/6617/files/toduroxemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2856/8474/files/65366150901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3970/9605/files/international_trade_and_balance_of_payments.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2368/7067/files/23604419579.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6761/2065/files/pretty_print_xml.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4136/3870/files/treatment_guidelines_for_constipation_in_pediatrics.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_off00005f5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5A 5424 bytes
SHA-256: 89ab51fff910a876fe5eb2b0d369f689089e3391277d3bee9cf4df9d23b57f01
font_01_sfnt_off0000719f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x719F 14928 bytes
SHA-256: 49d53b0509439ac361b9328a305af95fe7854ae9612b25d03c76258b8f6d2549

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