Malicious PDF — malware analysis report

Static analysis result for SHA-256 402a258fa22f5dcd…

MALICIOUS

PDF

48.9 KB Created: 2020-07-28 16:59:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fefea258614a6e3073cc6aa0e8d94ad0 SHA-1: 208a5222bcea79be06f4df843492a338330f9186 SHA-256: 402a258fa22f5dcd599ffbe004423bc29cd8b78d1e891a66c6dcc05198452d33
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a significant portion of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.cc. The document body, though heavily obfuscated, contains text related to 'emerging trends in education', suggesting a lure to trick users into clicking the malicious links.

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=emerging+trends+in+education+pdf In PDF document text
    • http://files.friendsofthemeadows.org/uploads/1/3/1/8/131871602/9464717.pdfIn PDF document text
    • http://files.thechangemanagementnetwork.com/uploads/1/3/2/6/132680901/jawib_zeluj_xotulivu.pdfIn PDF document text
    • http://files.jordantaxserviceinc.com/uploads/1/3/0/7/130739809/9921175.pdfIn PDF document text
    • http://files.mysteriousmisterenter.com/uploads/1/3/1/4/131406086/tevolufumo.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/1/0432/1103/0683/files/63834560301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4202/8182/files/womabiritiretupipopabujak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4926/3004/files/bolakizenegijami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4993/3208/files/vevif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/3648315559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0048/6312/files/85944317817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3140/2395/files/92033788314.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/10888573500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/64292129314.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7092/2655/files/latidovaluzulen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/72171367803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8887/7470/files/farifezexesimujokaburanel.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 7

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_off000082f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82F7 5284 bytes
SHA-256: e1db1fbf617b37ea6cc51ea0463513a20c417f6859bab4a10e3da4ebe9727196
font_01_sfnt_off000094d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94D5 9860 bytes
SHA-256: 36f6e835f38cf1d90de028dd24c2e92bc4a3174052260f603d2fef24ae003919

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