Malicious PDF — malware analysis report

Static analysis result for SHA-256 47939f09758f523f…

MALICIOUS

PDF

41.5 KB Created: 2020-08-22 22:29:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e555c3392f1ed2317818e7b9edb589a4 SHA-1: 7bf39f2e322ea27d5cdc2c543f334c2297a22629 SHA-256: 47939f09758f523f24895de128f0b3781bd2705ba9f29a86d25b45d965bf5d27
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and references educational content to lure victims. The ML classifier strongly indicated maliciousness, and the presence of numerous embedded links points to a SEO poisoning or link farm attack pattern.

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=free+color+worksheets+for+preschoolers In PDF document text
    • http://files.mindfulness-west.com/uploads/1/3/2/6/132695476/vetovo.pdfIn PDF document text
    • http://zobivun.rcoathletics.com/uploads/1/3/1/0/131070588/wokola_nuruw_kikigik_geduxatekip.pdfIn PDF document text
    • http://files.recoverycafeindy.org/uploads/1/3/0/7/130739949/75fec245.pdfIn PDF document text
    • http://files.maternity-depot.com/uploads/1/3/0/7/130740517/xupobe_takexufawimot.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/1/0433/3253/4440/files/61118479034.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8564/4447/files/67185836854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1359/4526/files/jubufizerominutufobiwowev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2124/6370/files/balance_general_en_ingles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5802/8959/files/73504094163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8372/5990/files/halt_and_catch_fire_imdb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3210/1543/files/xidonawuwuseluxen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6486/0575/files/mo_creatures_horse_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2526/8889/files/ctet_syllabus_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/microeconomics_chapter_12_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0908/0477/files/zefaselogak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1165/3282/files/zumageromimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44411244229.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 4

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_off0000656f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x656F 5004 bytes
SHA-256: 418c04d1c0534c965116e318fa99da7d4038804c784efe18d07517b8e470c834
font_01_sfnt_off00007683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7683 9956 bytes
SHA-256: a167fdf11edb5008d2554489fcf986124909c4e44e961708132e6b1796b1afa0

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