Malicious PDF — malware analysis report

Static analysis result for SHA-256 a595b980bbb61bcc…

MALICIOUS

PDF

44.0 KB Created: 2020-08-05 04:09:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0c23697eee12b2263a781ea3c6b0e924 SHA-1: f6de7e76d85d49566b828d3e90058c0d1d753009 SHA-256: a595b980bbb61bccbb908ff3f13dd954c4e60a436a3c90312194ed8883ae1c71
194 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning model and heuristics indicating it contains a malicious redirector link and a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://ttraff.cc/pify?keyword=proyecto+de+investigacion+arquitectura+pdf. While no scripts were extracted, the sheer volume of embedded links and the critical heuristic firings strongly suggest malicious intent, likely to redirect users to further malicious content or phishing sites.

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=proyecto+de+investigacion+arquitectura+pdf In PDF document text
    • http://nitami.annefeve.com/uploads/1/3/0/8/130814423/nutanidikulefujimuva.pdfIn PDF document text
    • http://files.intensitystockwatch.com/uploads/1/3/1/4/131409009/buwixipefikiman-vebisesixu-noduxu.pdfIn PDF document text
    • http://files.mcstorytellers.com/uploads/1/3/0/7/130738723/kufafizu-xarego-rarok.pdfIn PDF document text
    • http://files.minercountyhistoricalsociety.org/uploads/1/3/0/7/130776661/7120772.pdfIn PDF document text
    • http://files.stephaniemclaughlinart.com/uploads/1/3/1/6/131606490/857271.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/1/0429/9259/9193/files/nuduwumagut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0586/9208/files/purimotujoxedexapogejibil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/3144/9000/files/how_do_i_empty_my_mac_cache.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2011/4344/files/86763892150.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8117/9048/files/17146235802.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0924/4316/files/gta_san_andreas_girlfriend_guides.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1886/0190/files/62404375507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7922/1919/files/fikarafojapiku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5283/3687/files/bioorganic_medicinal_chemistry_letters.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 6

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_off00006797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6797 5580 bytes
SHA-256: 6e4f188dbe54fb0f309b2a4eec011bff3ee53d9a21b413342face2a8a9ab947f
font_01_sfnt_off00007aad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AAD 11840 bytes
SHA-256: a6ae5632d26012b27c14bef0ef8aaabe894da56e608bb2e0d8dd8eb0a4140064

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