Malicious PDF — malware analysis report

Static analysis result for SHA-256 1408d798cac2eb63…

MALICIOUS

PDF

41.2 KB Created: 2020-08-14 13:55:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b5c7e8c4714becd8f3226349f5b22231 SHA-1: d2448c3ad5072e8c57c71793532749087c811155 SHA-256: 1408d798cac2eb6397a3f07e1430efb87a1c4f450f0509287d46d239a0606164
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body and heuristics indicate a lure for free PDF downloads, likely a phishing or scam attempt. The ML classifier strongly supports the malicious verdict.

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/wb?keyword=comida%20mexicana%20recetas%20pdf In PDF document text
    • http://files.tvgoldsmiths.com/uploads/1/3/1/4/131407315/0f1370d56c0ec2e.pdfIn PDF document text
    • http://files.myjazztrumpet.com/uploads/1/3/0/7/130776308/999b5c.pdfIn PDF document text
    • http://files.c-moreflyingschool.com/uploads/1/3/2/6/132681443/1588864.pdfIn PDF document text
    • http://wigiz.clevelandsecuritycameras.net/uploads/1/3/1/0/131070420/jatog.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/1/0429/8106/4853/files/.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4717/4812/files/zivabojijawojopimawumezur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/solution_of_system_of_linear_algebraic_equations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5321/2060/files/jixojenavaruwatu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6099/9830/files/5288469785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0158/5569/files/ipad_annotation_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2668/5858/files/xabuzajegabatetewapawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8676/4446/files/total_gym_platinum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9286/0318/files/assessment_for_learning_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4295/4650/files/57899269876.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8909/1998/files/zeririjilined.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/2604/9182/files/jeferumodijopurudovojozot.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_off000061b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B1 5244 bytes
SHA-256: cb1b2d575a597f259c50b931a7ac62257c4e84d38aa7957e9899f6330493e27d
font_01_sfnt_off0000736f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x736F 11300 bytes
SHA-256: b9a612cc00445f20eb679567f4b2047d573f1023919c49bce35e46a5eaf68cca

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