Malicious PDF — malware analysis report

Static analysis result for SHA-256 83329a12af2dd9c5…

MALICIOUS

PDF

40.3 KB Created: 2020-08-09 22:40:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: eb3d5f3bdaf272cffd73907a39456ab1 SHA-1: 4d4bae07a84088d43b69c91b6220b7f4ae6a5750 SHA-256: 83329a12af2dd9c5b66d6ffe1c0f157b3ac87d2ce8916baec4c4b7da52c9f8b1
194 Risk Score

Malware Insights

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

This PDF file contains numerous links to a redirector infrastructure, specifically `https://ttraff.cc/pify?keyword=free+download+pdf+dictionary+english+to+bengali`, which is flagged as malicious. The document body and heuristics indicate a link farm designed to lure users with a fake 'free download' offer, likely leading to phishing or malware. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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=free+download+pdf+dictionary+english+to+bengali In PDF document text
    • http://files.pda4training.com/uploads/1/3/1/4/131438538/pezibixoxewopup-lisolar-firubef-jejubano.pdfIn PDF document text
    • http://ratoxe.arambulolive.com/uploads/1/3/2/6/132681513/bubuwimomu-robubuzewedoxed.pdfIn PDF document text
    • http://files.aprilfairbrother.com/uploads/1/3/1/4/131437889/6de74cdccab2ee.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/1/0433/0687/7080/files/57189589950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/2054/6211/files/55381308808.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/12525184785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1330/7541/files/dametujiwifutaxajevudiwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8039/3639/files/synchronous_and_asynchronous_communication.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9932/3558/files/surig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9063/9016/files/tyler_perrys_whats_done_in_the_dark.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7808/9878/files/cardiac_muscle_contraction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6380/3040/files/munuperilivifo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sigejorivuzogekos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/network_marketing_strategies.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50FC 5492 bytes
SHA-256: 22780453fc16ffc3aa5231a31f424fd24792307e966232c17100d5efd18846e7
font_01_sfnt_off000063b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B6 10128 bytes
SHA-256: 21a6ac52fe62729d036a96e08989aec8d70df89ad8809eab0a753658fe3ce242
font_02_sfnt_off00008663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8663 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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