Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b203bffadbe3e1b…

MALICIOUS

PDF

42.8 KB Created: 2020-08-08 11:37:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8d1deb6bdae8cd16ba80da443c4c5800 SHA-1: ceb31f5045a2c7c559f0d61b54fb3e6da3d5a126 SHA-256: 8b203bffadbe3e1b7092257d914926be7c687fc6e96f663c0ccf746d747a8f46
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to attract search engine traffic. The primary malicious link identified is https://ttraff.com/wb?keyword=spacecraft%20system%20engineering%20pdf, which likely leads to further malicious content or downloads.

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/wb?keyword=spacecraft%20system%20engineering%20pdf In PDF document text
    • http://files.howtobeastrongwoman.com/uploads/1/3/1/3/131380598/jilulenogudej.pdfIn PDF document text
    • http://files.ambiguouslyaj.net/uploads/1/3/2/6/132695280/peweliwesi-robod.pdfIn PDF document text
    • http://kubej.steinlecounselingservices.com/uploads/1/3/1/4/131407227/8543882.pdfIn PDF document text
    • http://files.carmenpuscas.com/uploads/1/3/1/4/131406841/dbc6cd03d5e80e7.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/1/0431/0266/6906/files/49067866947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5517/6097/files/angle_relationships_with_parallel_lines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7201/8845/files/sigmoid_function_numpy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2136/8472/files/ponimiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/5390788927.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5025/5014/files/eccentric_training.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9446/4929/files/55472781540.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0682/8441/files/91909315646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4997/4946/files/hollywood_movie_in_hindi_avi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1059/6765/files/human_activities_that_affect_the_environment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7996/4574/files/minifojuposemagutarawu.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
🗂 Part of campaign: zbmtwest.com 3 samples

Related samples 2

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_off00006945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6945 5648 bytes
SHA-256: 3c389047af0b76326f4ddb85a6a8d524eba5c6260e86ea685bd5710c911991d2
font_01_sfnt_off00007c77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C77 9796 bytes
SHA-256: 760e964f4836158634f5cdd7e8a92e40cfeb7b423d1c1de3d4b640048a98358d

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