Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a4ff7e3a3f317e4…

MALICIOUS

PDF

43.1 KB Created: 2020-08-16 19:07:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5b31979af306430ff9fc2274b24ff5d7 SHA-1: 55995074334aa3fe1009381c381bb5082c9c3119 SHA-256: 4a4ff7e3a3f317e415b541b7f2be160a9cc4043b71f3a94c2756b442dd09b73a
194 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which point to external PDF files hosted on Shopify. One critical heuristic firing indicates a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body text, though heavily obfuscated, contains the string 'Linfoma burkitt pdf', suggesting a lure to disguise the malicious intent. The presence of a malicious redirector URL is the primary indicator of malicious activity.

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=linfoma+burkitt+pdf In PDF document text
    • http://files.clarkecountymentorprogram.org/uploads/1/3/1/4/131453156/goretaligowaluviga.pdfIn PDF document text
    • http://xekukusu.clubbowwowresort.com/uploads/1/3/2/7/132740324/4495188.pdfIn PDF document text
    • http://files.ceasefirelive.com/uploads/1/3/2/8/132816195/tojunalanuref_linawimileje.pdfIn PDF document text
    • http://sogosuwa.jenniferborkowskidesigns.com/uploads/1/3/2/6/132681670/gexegisupitavi.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/1/0434/5682/3462/files/45818596755.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8626/6016/files/17409213148.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6323/8056/files/gepevar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9800/3874/files/zefuke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/bakiwaferarelobekaripu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/rexidibolugazunaroze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7644/2519/files/89202683428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/advanced_pivot_table_excel_2020_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4402/8068/files/50706695890.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7573/7502/files/tadunoletijaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8501/1871/files/snake_cool_math_games.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6659/7288/files/litawugezoxozawagor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7908/9824/files/41309570957.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 4

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_off00006a6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6F 5124 bytes
SHA-256: ea60382c1e0d03d6667f1772d976339cd00a8a17df62cececacaddf21e2c33da
font_01_sfnt_off00007bbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBD 10588 bytes
SHA-256: 0ed853899e7efd1f9731627bc39afae580b3561144ca9f45d096782235e1fb27

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