Malicious PDF — malware analysis report

Static analysis result for SHA-256 2acf65475d4472ca…

MALICIOUS

PDF

41.3 KB Created: 2020-08-18 13:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ce5e548dbe529811cd15b037008e7c69 SHA-1: 7dba8640d63dbf90e471f74dd884cbdbfa562168 SHA-256: 2acf65475d4472caf0dae7869bf75e7b26eb860615389b108f8ea9839e82f6f0
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.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains text suggesting a 'colouring fractions worksheet' lure, which is likely a pretext to encourage clicks on the malicious links. The ML classifier strongly indicates maliciousness, and the presence of a redirector URL is a high-confidence indicator of malicious intent.

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=colouring+fractions+worksheet In PDF document text
    • http://files.onwardcatholicsoldier.com/uploads/1/3/1/4/131453028/jodazija-nisevenevenif.pdfIn PDF document text
    • http://tiles.mounthollywood.org/uploads/1/3/1/3/131380600/jajegijupozivo.pdfIn PDF document text
    • http://files.lindajluna.org/uploads/1/3/1/3/131384635/9441370.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/1/0427/7387/2807/files/tomenakugegovovel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0394/4853/files/definicion_de_historia_segun_autores.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5695/4518/files/sizusewisid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0672/8091/files/pojotogo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/29620544781.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9149/9935/files/98238105684.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/fatotifudobobanofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1760/0152/files/desirifofafof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/40821469294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/anatomy_and_physiology_2_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2651/3048/files/completing_the_square_maths_genie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6239/2992/files/second_line_old_version_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7795/8816/files/62857971706.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5676/6869/files/7.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 3

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_off000062d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D3 5204 bytes
SHA-256: d3952dbba5caa99aab32386ceabf00cb2507fd886bbfbaaec706c8fe1ad55c33
font_01_sfnt_off00007497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7497 10444 bytes
SHA-256: 84c58ccba8f19d9878fb2aa1c513665b934266db649568b6f88b5ec3719bb632

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