Malicious PDF — malware analysis report

Static analysis result for SHA-256 98178a15ab8654b8…

MALICIOUS

PDF

37.2 KB Created: 2020-08-09 18:24:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4cfd3578d67806fd0cacfd9d68ae3405 SHA-1: 797ee23a81bbd2dad05bd68f0a5e1210161698a4 SHA-256: 98178a15ab8654b82748f731b3fef799c64ad1dc7b842b3a9b709074ca82fc59
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains text related to 'French classroom objects worksheet pdf' and a URL that appears to be the primary lure. This suggests a social engineering attack aiming to redirect the user to malicious content. The primary IOC is the redirector URL: https://ttraff.cc/pify?keyword=french+classroom+objects+worksheet+pdf.

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=french+classroom+objects+worksheet+pdf In PDF document text
    • http://files.clwindowwashing.com/uploads/1/3/0/8/130873717/gevorisutile-wamip-puduzoj.pdfIn PDF document text
    • http://files.wellsmusicpublishers.com/uploads/1/3/0/8/130874067/7865840.pdfIn PDF document text
    • http://donuro.maliagillette.com/uploads/1/3/2/7/132740214/228696.pdfIn PDF document text
    • http://files.vicbutton.com/uploads/1/3/1/4/131438216/xasukaniw-vamizafove-gebarezinif-jubeka.pdfIn PDF document text
    • http://files.halloweencity.ca/uploads/1/3/1/0/131070212/3bd1ff912044e4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/53330500898.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5245/7369/files/abraham_j._twerski_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4551/9513/files/89581452074.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3141/3414/files/62663704575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6310/6968/files/39542739296.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7430/4662/files/english_speaking_sentences.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7482/2043/files/17248813001.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4189/0208/files/mozizawelasaxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6173/0718/files/8571060881.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4012/9692/files/puwujirefofazugitexu.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 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000459d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x459D 5460 bytes
SHA-256: 891d056e703f571dd4861fe09bae23026fc608d819b66bf933a868a87f47b218
font_01_sfnt_off0000580c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x580C 9856 bytes
SHA-256: 1892f0436269f97b61c6ed1bbf69c36c7df31e4c0056c20d8c1a26b82df42749
font_02_sfnt_off000079c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79C5 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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