Malicious PDF — malware analysis report

Static analysis result for SHA-256 337e6ab4f97a60f5…

MALICIOUS

PDF

32.5 KB Created: 2020-08-18 23:25:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b07c33dfd3adc7cab27042dcdcb8ffcc SHA-1: 2e9714ededf9a143fc0b92f8420f81a0f6d988cc SHA-256: 337e6ab4f97a60f59ab4ec4f11f1b3ab3b4a788cdb914e8383700ab229c6d400
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, a common technique for SEO poisoning and redirecting users to malicious sites. One of the primary links, 'https://ttraff.ru/pify?keyword=arapahoe+basin+trail+map+pdf', is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDF files, suggesting a link farm designed to attract traffic and potentially deliver malware. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/pify?keyword=arapahoe+basin+trail+map+pdf In PDF document text
    • http://files.biblesforasia.com/uploads/1/3/0/9/130969506/derezowave.pdfIn PDF document text
    • http://files.mmetthey.com/uploads/1/3/1/3/131380870/fowidifowupeg-gamilaxumid-fasekurodib-kekaje.pdfIn PDF document text
    • http://files.redkora.com/uploads/1/3/1/3/131382470/4269323.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/1/0436/1384/7710/files/td_ameritrade_application_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7003/6904/files/ti_nspire_programming_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4574/6838/files/wiwusizusetalimuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7229/8913/files/50780422394.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4618/1787/files/17673500658.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/24745358762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4190/5045/files/rodomimuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/6888/7964/files/56219266111.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 5

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_off0000418b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x418B 5412 bytes
SHA-256: 722804608a3b0b8f8605d39bc497368ac95ea36189acef690f8ae63e3d877285
font_01_sfnt_off000053b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53B9 10048 bytes
SHA-256: 0c13a9ce7eb7764d24c1e51aaf26d9191c756df28e2447b470f9f817bd8fabb1

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