Malicious PDF — malware analysis report

Static analysis result for SHA-256 4439bdc37664b0f9…

MALICIOUS

PDF

43.4 KB Created: 2020-08-11 07:07:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 03d1172d39709697ef829baa6d27af42 SHA-1: ab4ce97a9e0ae46d4a7004dedf5957a5b2bf8ce4 SHA-256: 4439bdc37664b0f9999d42daf9b78514e46a4508c42dc7312d2bec9019156937
202 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a link farm hosted on Shopify. One of these links redirects to a known malicious domain (ttraff.com), indicating a phishing or redirection attempt. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=le+gall+brownian+motion+martingales+and+stochastic+calculus+pdf In PDF document text
    • http://files.barkcultureco.com/uploads/1/3/1/0/131070561/dd669a2.pdfIn PDF document text
    • http://files.seymourdachshunds.com/uploads/1/3/2/7/132740193/5301442.pdfIn PDF document text
    • http://files.wilkersonhomesinc.com/uploads/1/3/2/6/132681536/a3b633973fb2.pdfIn PDF document text
    • http://files.med2u.com/uploads/1/3/2/8/132814972/5293885.pdfIn PDF document text
    • http://files.newhopetherapyhs.com/uploads/1/3/1/0/131070506/nasofem.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/1/0434/3355/8182/files/wovasizegamok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8911/6836/files/7275679057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5710/9402/files/89855598201.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/curso_de_ingles_basico_portugues.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6388/6495/files/69998979483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1402/8444/files/irql_not_less_or_equal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5625/1555/files/57487270915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8609/4241/files/convert_excel_to_using_apache_poi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/74710594537.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5377/7047/files/78316472053.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6486/0575/files/2441523823.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_off0000697f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x697F 5740 bytes
SHA-256: c505d79b542fdf13ad49f07c1d3714f15fb91b186946a8e76d1d360e7a643a08
font_01_sfnt_off00007ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE7 10332 bytes
SHA-256: e905e5fc884bc98984ad2f6c0be2c6e7b750be54e7ab26a66445bd40f5140d70

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