Malicious PDF — malware analysis report

Static analysis result for SHA-256 72f665fdf60e7fad…

MALICIOUS

PDF

42.8 KB Created: 2020-08-16 22:24:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c5a052effd8949bf2d68552f3ebabad3 SHA-1: 74f9e576655bb349e408f003487b61023b7cfefb SHA-256: 72f665fdf60e7fad42977a5380eb20c2db981a8176a6bde8cb31c50d991abd9c
194 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a redirector service. The primary redirector URL is https://ttraff.ru/pify?keyword=long+division+worksheets+pdf+grade+5, which is likely used to obscure the final destination. The document's structure and numerous links suggest an attempt to create a link farm for SEO manipulation, potentially leading users to malicious sites under the guise of educational materials.

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.ru/pify?keyword=long+division+worksheets+pdf+grade+5 In PDF document text
    • http://files.trompandcircumstance.com/uploads/1/3/1/8/131871462/jezesepu-getemaz.pdfIn PDF document text
    • http://files.ohmog.org/uploads/1/3/2/6/132681488/todire_vuwot_pelixululijolo_lufojasil.pdfIn PDF document text
    • http://nefepad.mychildrendevelopment.com/uploads/1/3/1/0/131071164/jesidetazufitak.pdfIn PDF document text
    • http://files.travelandfellowship.com/uploads/1/3/0/7/130739564/nimuzidosuzisigiwir.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/1/0434/4066/8838/files/22778405466.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2359/6711/files/53651316477.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6513/0658/files/21716536457.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1329/8581/files/gusis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/popezixigirotesivaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/9332/3929/files/geomorphology_upsc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4795/2294/files/78139534353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/35199565952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7883/4583/files/60418961623.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/1451/6899/files/wulojepir.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6790 5552 bytes
SHA-256: ca1bc916036bba339bfd3ab1966cd00e1204b6f7ff87e42544e76f3b5f482aad
font_01_sfnt_off00007a91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A91 10400 bytes
SHA-256: 5833d14e7d5efc2c2aceed6432d8da71d53b61564d15e26b9a455418fab26880

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