Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a21679334a696bb…

MALICIOUS

PDF

43.8 KB Created: 2020-08-06 11:33:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ca0c93f226feff80f0e22b5ef865e433 SHA-1: ccf4e563a3d61da2e7359cdac341f0b71fb28d29 SHA-256: 1a21679334a696bb79e548c1508c96dbe8a51bb126cb5e50c9c0478184424f12
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is part of a link farm designed to lure users with SEO-optimized book download lures. The primary malicious link is https://ttraff.cc/pify?keyword=site+reliability+engineering+book+pdf+download, which likely leads to further malicious content. The ML classifier strongly supports the malicious verdict.

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=site+reliability+engineering+book+pdf+download In PDF document text
    • http://files.facsglobal.com/uploads/1/3/0/7/130775503/1035398.pdfIn PDF document text
    • http://files.cherryblossomwellnesssalon.com/uploads/1/3/1/3/131379730/tugikoriz.pdfIn PDF document text
    • http://womowimaf.bcmediaphotos.com/uploads/1/3/1/1/131163635/jojor.pdfIn PDF document text
    • http://files.rileyortonfoundation.org/uploads/1/3/0/7/130740586/xafozusefise_tesanegatuni.pdfIn PDF document text
    • http://files.calmundertension.com/uploads/1/3/1/1/131164272/dejatejunobutenaku.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/1/0433/0687/7080/files/fexofedome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8606/1480/files/tepovegunapovajegaputa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7247/0686/files/moguboratukadidexax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4557/7116/files/vusajafowuduf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/pizalafudewusapusigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/wivepine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8000/0422/files/30266637170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0841/6165/files/78841590787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7600/9632/files/pavawuxunedugipejuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3094/5693/files/bixazewuba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0678/6725/files/marvelous_designer_6_tutorial.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_off00006adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ADB 5532 bytes
SHA-256: 095c613b3b0ba7102e0cf09903338d7283236df031e71df28f68d1dbb7732167
font_01_sfnt_off00007dcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCF 11292 bytes
SHA-256: 8d45635898a30311835611be8372c7c55bbf8bd6c58693c0c42e0ff45c6fda12

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