Malicious PDF — malware analysis report

Static analysis result for SHA-256 50bd71e242d34c1f…

MALICIOUS

PDF

37.8 KB Created: 2020-08-23 00:27:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 424ba111add7e0755d8c24b79f40b2a6 SHA-1: f0fa1d0d2846837ee8e92b727049983ce0f2d292 SHA-256: 50bd71e242d34c1fbf3d040714defa64096813b75b00ac0993674246d1bb74a7
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links directs to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the URL for the malicious redirector, suggesting an attempt to lure users to malicious infrastructure under the guise of educational content.

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=combining+sentences+worksheets+middle+school In PDF document text
    • http://files.tasmantranscription.com/uploads/1/3/1/8/131856330/nebojokan-nexolirobotob-texabudekupuxu-xedizezilili.pdfIn PDF document text
    • http://duzafi.backpackexpedition.com/uploads/1/3/2/3/132303382/remenajem.pdfIn PDF document text
    • http://files.festivalofwordsde.com/uploads/1/3/2/8/132814589/ketow-zizeremovebika.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/1/0432/4635/4592/files/subowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/8125/6360/files/consider_the_lobster_and_other_essays.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3050/2806/files/dapebiwaler.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38970143778.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54903558396.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3062/3894/files/vupazutinaxowawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9981/4056/files/46320974995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2942/2499/files/62307277831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9254/8515/files/cheat_sheet_python_numpy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6483/6764/files/36261993258.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2223/8374/files/corrugated_box_design.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 2

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_off000055ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55AD 5344 bytes
SHA-256: fa153e0ecf1439ed6aa4324234c293b21bfe1dca921cde8736b0d50970d4f8b6
font_01_sfnt_off000067c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67C2 10088 bytes
SHA-256: 96c1667946eefb530dca635a20fb5cc4fb746409aaa18b51e8c3b38f9a97bcf7

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