Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b6d063b1d8c8740…

MALICIOUS

PDF

60.8 KB Created: 2020-08-04 11:29:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5e22cb5a1eb127dbe6ef96fc1307e67f SHA-1: a2a612d3caa91707dd5b19b357216453427bf91f SHA-256: 4b6d063b1d8c8740f502eeba517f77e5a7c1d72006ca1a5ff60213a29e517c02
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified as a redirector. The document body, though heavily obfuscated, contains text related to 'english lessons pdf' and a URL that appears to be part of a link farm designed to attract search engine traffic. The primary malicious URL identified is https://ttraff.com/pify?keyword=original+effortless+english+lessons+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.com/pify?keyword=original+effortless+english+lessons+pdf In PDF document text
    • http://files.quiltbymachine.com/uploads/1/3/2/7/132740804/motaza.pdfIn PDF document text
    • http://tomuxa.onurokcal.com/uploads/1/3/2/7/132710797/33050b5df35c46.pdfIn PDF document text
    • http://files.mchsapchemistry.com/uploads/1/3/0/8/130813489/galenorox-jupuwamogoruf-pugusu-sodinulosil.pdfIn PDF document text
    • http://pukoluten.puremichiganminiaussies.com/uploads/1/3/1/6/131637136/ce03018245ffab.pdfIn PDF document text
    • http://files.bambooartscenter.com/uploads/1/3/1/8/131857071/pujeriwetid-napofemerumaw.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/1/0431/9952/9121/files/tizokiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6519/6197/files/21635904030.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2478/5319/files/migulinubugupoxulorubasol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8582/4164/files/vasuxosawedef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/82635807748.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/suradidititivavuvifug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9665/4499/files/kixesox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6795/7658/files/gilelodovosafarifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9575/2858/files/zunatinawununidit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0055/1830/files/vevilaludijigo.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_off0000a95f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA95F 5328 bytes
SHA-256: 6c55c7ff7650e594cacefcab3dfd8e259de70a4c478e110dcd2f2d301edc77b7
font_01_sfnt_off0000bb77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB77 15876 bytes
SHA-256: 33cb20c1d989578567094ee79c88015bf2a74b9edb8880603d106460b95864f9

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