Malicious PDF — malware analysis report

Static analysis result for SHA-256 84a23df8a7c0719a…

MALICIOUS

PDF

37.2 KB Created: 2020-08-18 17:22:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e4b183dc6a861326ddb1b3ea9d91063f SHA-1: 55044d48d34a5842f40d502ff78b61ffadeed761 SHA-256: 84a23df8a7c0719a1c4f44b667cf77a58b2ca761582fb8b55886e5ebe1da830d
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.cc) which is flagged as malicious. The document body, though partially obfuscated, includes the same malicious URL and benign-looking PDF filenames hosted on Shopify, suggesting a link farm designed to lure users to malicious content. The ML classifier also strongly indicated maliciousness.

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=surah+naba+audio In PDF document text
    • http://files.suffolkartleague.com/uploads/1/3/1/0/131070604/4981411.pdfIn PDF document text
    • http://rosali.gerrygillespie.net/uploads/1/3/1/3/131380999/tepejeradavam.pdfIn PDF document text
    • http://files.shatteredpec.com/uploads/1/3/0/8/130874162/rasimewajubu-buxesikix-nafurewokuvugen-kuronafo.pdfIn PDF document text
    • http://files.mymichellelewis.com/uploads/1/3/0/7/130776409/7ec0f10.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/1/0434/3093/6732/files/sutolinuduxagid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6921/7699/files/allshare_pc_windows_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8400/5032/files/serunoruparokodofezinibaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5470/1463/files/51058474239.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7273/2825/files/89447499441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5186/7557/files/32917579664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4445/2005/files/francis_bacon_essays.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7077/4693/files/86268001972.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1378/3199/files/al_quran_tajwid_indonesia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8117/9037/files/pibiduxorolewu.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_off00005788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5788 4944 bytes
SHA-256: 3814a58752b7edd21db27b83bf4a5580be5496e5e163b301be75457da1ad1ebe
font_01_sfnt_off00006843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6843 9516 bytes
SHA-256: 9bd9e4ceb30189d439970e84b3b0dcc70edaa3e0966ca7f4afd70b788b4d522f

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