Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae672b5a57ef4945…

MALICIOUS

PDF

43.7 KB Created: 2020-08-22 21:18:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3a557ee3fbaf393587bfb33a117b2d1c SHA-1: 80b6b22fafca7480428c1adcec0e5d0d3b64c44e SHA-256: ae672b5a57ef4945c145313f6f6cbb2dc881e6fbe54a3983bbf28abe9606e354
194 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same redirector URL and a benign-looking PDF title, suggesting a lure. The presence of a link farm indicates an attempt to distribute malicious content or conduct phishing at scale.

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=deep+water+question+answers+pdf In PDF document text
    • http://zadax.hawaiiwritersguild.com/uploads/1/3/1/4/131453033/sifaz.pdfIn PDF document text
    • http://nedogapex.trainingmadefair.com/uploads/1/3/0/7/130775388/vipubefutum.pdfIn PDF document text
    • http://files.gcemergency.com/uploads/1/3/0/9/130969645/4181a76e3be7b9a.pdfIn PDF document text
    • http://files.farmdiva.net/uploads/1/3/1/6/131606537/9c79c384b7fc829.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/1/0434/9997/8904/files/b_form_of_dna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5838/8392/files/72021847717.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6676/7013/files/analytic_geometry_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6886/6212/files/37947363508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/3228/0994/files/juburevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4347/1003/files/39992577257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5522/6778/files/jizaxejilap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9174/5185/files/trastorno_de_ansiedad_social_2020.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 4

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_off00006f34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F34 5220 bytes
SHA-256: 5ea573e8dc3b8585f00026b7461c04555f80d4ffe3d01dbf95f1dac0afda0897
font_01_sfnt_off00008118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8118 9812 bytes
SHA-256: 9dc039f8659d28498aa4a7b65ba0a681ccbbdd5049de01b7f6f4506b2feb5294

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