Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4b150202de4d267…

MALICIOUS

PDF

40.3 KB Created: 2020-08-23 19:49:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 048b74ff0f1d73aa47bea188bfad655e SHA-1: 42ed547ff3ad29afba13bd765212b16870528823 SHA-256: c4b150202de4d2674fe11ccf47378bf12120e84fd542fd6781234a37d1f6de76
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. The PDF_SEO_LINK_FARM heuristic and the presence of numerous Shopify-hosted PDF links suggest a link farm designed to improve search engine ranking for malicious content. The primary malicious URL identified is https://ttraff.ru/pify?keyword=warframe+exploiter+orb+guide, which is presented as a 'warframe exploiter orb guide' to entice clicks. No scripts were extracted, and the document body was heavily obfuscated, but the link farm and redirector are strong indicators of a phishing or malware distribution attempt.

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=warframe+exploiter+orb+guide In PDF document text
    • http://files.pachecoathletics.com/uploads/1/3/1/4/131438835/16e64dae.pdfIn PDF document text
    • http://ziwowipix.armleydancestudios.com/uploads/1/3/1/3/131383664/vezafobigudewo-bunuzowiwuzewex.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/1/0433/7483/7925/files/talebek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4628/1121/files/68751868763.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0595/8553/files/alpha_helix_vs_beta_sheet_amino_acids.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9088/6312/files/wikonanemufezapamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5764/2648/files/blender_rendering_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/wakexefogozatimuzasunedoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7623/1072/files/asterix_and_obelix_comics_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2974/9145/files/equations_in_r_markdown.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9040/3737/files/sejezemokikegikunebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2975/6066/files/chemical_equilibrium_class_11_ncert.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9864/5404/files/32965383450.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5122/0120/files/betraying_big_brother.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 7

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_off00005fbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBC 5404 bytes
SHA-256: 9c22ef3a1104f020c48042469752e61f855cccaee62461d9b4260d2f20ffb21d
font_01_sfnt_off00007215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7215 10096 bytes
SHA-256: 9396bb7737c781cae88d033b11ffd9e8418170b3d659fb954d1522d110fa141f

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