Malicious PDF — malware analysis report

Static analysis result for SHA-256 81689bc3f318c346…

MALICIOUS

PDF

60.1 KB Created: 2020-08-07 05:40:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 16616e47945c042eb9f3f3960abb82ac SHA-1: 16bcae2550207c69f84f09315bbfbe606126385d SHA-256: 81689bc3f318c34664294ed9ce51f37f2b559a7bec75b7ae762943e521079962
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating it's a malicious redirector and part of an SEO link farm. The embedded URL and document body text point to a lure for a 'free download' which redirects to the malicious domain ttraff.com. This suggests a phishing or scam attempt designed to lead users to potentially harmful content.

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.com/pify?keyword=aprendizagem+baseada+em+projetos+livro+pdf In PDF document text
    • http://files.heartsindixie.com/uploads/1/3/2/6/132681713/bivuvipupivujiralud.pdfIn PDF document text
    • http://files.ailienvuong.com/uploads/1/3/0/9/130969310/2249e2d.pdfIn PDF document text
    • http://files.countrysquireinn.com/uploads/1/3/1/0/131070178/xaxoliwixurawiz-sadowuzi-wofavuzuvositib-pufuvej.pdfIn PDF document text
    • http://zosozez.mindfulteachermindfulstudents.com/uploads/1/3/2/6/132683014/5440875.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/1/0435/4709/9287/files/gewifitifu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9464/6689/files/47460458319.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/35980765455.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3970/9605/files/tvpad_usa_dns.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8269/4312/files/bolawirezasoxozisafow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7919/7081/files/vifepujizadobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7233/1675/files/valumavurozapoxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7226/6138/files/92392919515.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3876/7264/files/29572354578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9581/8404/files/gawusiniju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2250/0518/files/69217308553.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6807/0815/files/express_js_tutorial_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1311/8872/files/23446942544.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2519/3368/files/punibiladularufirulaxo.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 3

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_off0000a589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA589 5676 bytes
SHA-256: 54318882a3eeef1d9fdcae5e53572cd080c703fd3be1472bd139022f3ea0c424
font_01_sfnt_off0000b8d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8D8 13164 bytes
SHA-256: 3765edee217abcd772863b7e9e3a0f2b5c58efa0b4f7a4f1aa4fda50e62435bb

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