Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f98d42923ea1530…

MALICIOUS

PDF

73.8 KB Created: 2020-08-14 01:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a3e3f8efd50fd1edafa7d08dc902bce0 SHA-1: 4e3df04c69097d0e7945a940ad1073679e13cff4 SHA-256: 3f98d42923ea15303421cd6c6f1693aec0a234ff0d415c9fcedadcb661445fa9
202 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm pattern, with numerous external links, including one to 'cdn.shopify.com'. The document body, though heavily obfuscated, contains the same URL found in the redirector heuristic, suggesting it's the primary lure. The presence of urgency language further supports a phishing or social engineering attack vector.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=idsa+guidelines+bacteremia+gram+positive In PDF document text
    • http://files.nextlearning.de/uploads/1/3/0/8/130873921/3355187.pdfIn PDF document text
    • http://files.draiochtshoppe.com/uploads/1/3/1/0/131070982/dc3b2d3a69.pdfIn PDF document text
    • http://files.joshklemons.com/uploads/1/3/2/7/132740595/sifozit_voroxowojeku_rulozu_wosakakuda.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/1/0431/7315/0869/files/license_express_washington.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3353/2315/files/candlestick_chart_patterns.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4166/6710/files/27233419935.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7054/6329/files/mathita_dvd_ram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/ocr_plugin_for_wondershare_editor_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5497/9477/files/sims_freeplay_cheats_iphone_2016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/nagavenipabide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1393/9101/files/dapetizebek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3477/9553/files/kogubagujitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1063/7475/files/10307728497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4752/6305/files/44342193446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2144/2965/files/medical_nanotechnology_and_nanomedicine.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 7

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_off0000e1c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C5 5528 bytes
SHA-256: e220ac851a88d9336768ea6088502d3c707287c0afc840d14eb6ceda804b5c8f
font_01_sfnt_off0000f476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF476 11488 bytes
SHA-256: c77ee7f851e4b827bda9852023a706dd8b64b357eec1f8a563dd5e3d942443b8

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