Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a86754f0485029b…

MALICIOUS

PDF

36.9 KB Created: 2020-07-30 02:41:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7b0e1fdfa2ee8df6e64d035a8cf2cf00 SHA-1: f00a44ca12b2e2a11b4e1b29e430c6324ef54689 SHA-256: 3a86754f0485029b1e75da47ab297424b3271c94f2087f9d087673255a291464
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, suggests a lure related to 'exercises pdf'. The presence of a link farm and a malicious redirector indicates a phishing or malware distribution attempt.

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=causative+have+all+tenses+exercises+pdf In PDF document text
    • http://files.christinekingcounselling.com/uploads/1/3/1/6/131636682/4b83bef48ff7ad2.pdfIn PDF document text
    • http://files.driversedgrades.com/uploads/1/3/2/6/132696267/suxaki.pdfIn PDF document text
    • http://files.silfradentasia.com/uploads/1/3/2/6/132682723/a25fbf0.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/1/0431/1787/1255/files/14015257259.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7410/1149/files/piwesozipe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3910/3912/files/maxezof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1571/6516/files/61028817292.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8305/5782/files/nifadijixabixonilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6974/4028/files/98079917192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/rolobonifoledoro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8233/3856/files/nuxaxewubofimakusadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/dinirodifawake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1024/5286/files/47685037677.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_off000051f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51F1 5164 bytes
SHA-256: de0186881221cf1d9426f232c7543475785f4a9dd469684167e20a59d063cd63
font_01_sfnt_off00006381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6381 10332 bytes
SHA-256: d1a9820c2e2fd4da17bf71bbbb4c22db220c267b56f998fd0b8c54fb288b3d5d

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