Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcb27daf69ff6857…

MALICIOUS

PDF

41.3 KB Created: 2020-08-08 14:46:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5a3dfbc104b9052f4f050b2550689972 SHA-1: e2aed2cc51b3148ee72ab157dd049b624c1c0297 SHA-256: bcb27daf69ff6857bd176227f20c41bf678f2b9fa7e60e31fc88a2e0e4ec2272
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to the redirector. This suggests the primary goal is to redirect the user to malicious content, likely for phishing or malware delivery.

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=amebiasis+intestinal+tratamiento+pdf In PDF document text
    • http://files.trinitylutheranconnellsville.org/uploads/1/3/1/6/131636589/lijepejuk.pdfIn PDF document text
    • http://files.infin8photobooth.com/uploads/1/3/2/6/132681863/puritumefa_sagabuxis_legafab_bagukokagosupol.pdfIn PDF document text
    • http://files.readtransformmedia.com/uploads/1/3/1/6/131606020/4291229.pdfIn PDF document text
    • http://files.bearnecessitiesworkshop.com/uploads/1/3/2/6/132695329/kufoxa.pdfIn PDF document text
    • http://files.ikaruscoffee.co.nz/uploads/1/3/1/4/131407135/mapufatuboletida.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/1/0427/7207/0556/files/interview_questions_for_production_manager.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3119/0952/files/adenitis_inguinal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4834/3464/files/etude_de_la_cellule_animale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6488/3355/files/18900037131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5433/3093/files/tibazimigosesedu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4338/9597/files/pujulalom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jepomosojavadoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2642/3701/files/antenna_wave_propagation_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3928/4645/files/50916148669.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pufabupenidobuxix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0094/7103/files/seviwadonujowosazedus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9156/6493/files/math_for_economists.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_off000063a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A8 5316 bytes
SHA-256: 1317e04dc7a5f1dfa6faa8c88187944bea7cf561f7345b5d39fd9d2e3a13bc39
font_01_sfnt_off00007598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7598 10212 bytes
SHA-256: 2423bd47e0f3573f189c4d9798699bf40bb0a9c4d67b8efe95fc10a5d7f10665

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