Malicious PDF — malware analysis report

Static analysis result for SHA-256 51773a4da7d834e1…

MALICIOUS

PDF

42.5 KB Created: 2020-08-22 03:07:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ff508db91eb0e1f1561fe79e4e4cad81 SHA-1: 6800b4eb4cdcc780236bde08e38c39de1cf26b08 SHA-256: 51773a4da7d834e194129e4b7f2bcb37e9ef81909fb7f2214ccddcab7acf1a9d
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=baptist+choir+songs+free', suggesting a lure to a malicious site. The presence of numerous Shopify links, while many are confirmed benign, indicates an attempt to obscure the malicious destination within a larger link farm.

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=baptist+choir+songs+free In PDF document text
    • http://files.risikat.com/uploads/1/3/2/6/132696112/053a0f59a.pdfIn PDF document text
    • http://files.myoridefitness.com/uploads/1/3/1/4/131454916/763051.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/1/0432/8026/9477/files/87148995217.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5506/2948/files/dapizugogirog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0305/9110/files/9641313654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4222/6854/files/46070592211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/14541056263.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9689/9733/files/79396729657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4513/3207/files/54494447447.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8677/4436/files/lelifubasitusaturutesuweb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/zasadubedupebika.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 8

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_off00006849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6849 5296 bytes
SHA-256: d1acc7235e4bed83856647bd2e42eb23f259417e0cc30be61670af39c7310cf5
font_01_sfnt_off00007a3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3C 10196 bytes
SHA-256: 0f1cd37af72dd412b72517c9e23ee16e8c188995ca3701d40799250df7f3a5cc

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