Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddb6e84890f03286…

MALICIOUS

PDF

59.9 KB Created: 2020-08-08 02:31:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bc6a35b4110a44df8cfd3cf031cd7868 SHA-1: d9bfa2c5b7d2fe10ed009f66b46b57f5b5b89aa6 SHA-256: ddb6e84890f032866b83e3127599bb6e51866a74e365c98debfee450a302b1a1
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, many of which point to suspicious or unknown domains, suggesting a link farm or redirection scheme. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the ultimate destination. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to the malicious URL and legitimate-looking file names, likely intended to deceive users.

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.cc/pify?keyword=bel+canto+singing+pdf In PDF document text
    • http://files.wabanaflowers.com/uploads/1/3/1/6/131636987/jadusuriwov_zonolu_vitetuviwa.pdfIn PDF document text
    • http://files.updatedfl.co/uploads/1/3/0/8/130814423/4445657.pdfIn PDF document text
    • http://files.gwheelerfishingguide.com/uploads/1/3/1/4/131438260/paxel_sakimegojikixol_zujej_rozoja.pdfIn PDF document text
    • http://files.charbeneaudesigns.com/uploads/1/3/0/8/130874254/33cee01305c769.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1610/8707/files/grammar_exercises_pre_intermediate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5404/7137/files/logixibubibav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/tipos_de_adjetivos_en_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6001/0912/files/72182989605.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0406/6983/files/rezanakunosufepexov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4096/3750/files/muvivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2776/7206/files/betij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6827/6384/files/zabumimolojitiga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/46324180498.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0702/5060/files/medicinal_chemistry_practical_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9254/1589/files/xevililogowunines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0290/4222/files/govukutezojipibasadi.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA040 5064 bytes
SHA-256: 233005706b489d775a1614c5ac6f3953273ae2036168e5bd3c8ee0c1b7cc4e7c
font_01_sfnt_off0000b189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB189 10324 bytes
SHA-256: 4dfd74e1bb4f26faee391768a9f81ef30ee573784e58b080a26102432c727360
font_02_sfnt_off0000d4cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CC 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3