Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fdb94dbd7f18a6e…

MALICIOUS

PDF

287.7 KB Created: 2020-08-14 20:10:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f3de42d5c8935a0a8a858c32c43d1254 SHA-1: abd025dc2c019c3e1f14dff17021ad6bcc091dcb SHA-256: 5fdb94dbd7f18a6e027d7f6b6815c8eadaa7010b2eea64f8e80f52881c0b937e
134 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. This redirector is presented with a deceptive filename, 'Esc guidelines 2016 af', suggesting a phishing or social engineering lure. The ML classifier also strongly indicated maliciousness. The primary IOC is the redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 4

  • 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.
  • 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=esc+guidelines+2016+af In PDF document text
    • http://files.carlemile.com/uploads/1/3/2/8/132816107/wumenefim.pdfIn PDF document text
    • http://files.roleofsource.com/uploads/1/3/0/7/130775393/xepovurav_nugidiwatidefe_zijat.pdfIn PDF document text
    • http://files.mythnmagik.com/uploads/1/3/2/3/132302764/4947759.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/cubase_7_trial_activation_code_crack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5563/5871/files/ielts_writing_task_2_format_structure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7115/8949/files/8363951176.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6960/2978/files/72589996750.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3458/1911/files/dakatubilametidape.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5756/9189/files/herbalism_leveling_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/misaxejedamasunarutoteje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1947/4856/files/affairscloud_puzzle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2160/6820/files/business_goals_and_objectives_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9033/7174/files/gekiro.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 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00042983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42983 5224 bytes
SHA-256: 69e64444ce2eb7571fbb0189ad82119f5158d6fda924765db538b4f1f3398636
font_01_sfnt_off00043b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43B4F 11288 bytes
SHA-256: 5788f2b02df6339fb0e907d9163e26201389b5e0c7f7cc91ed774bb146d60f37
font_02_sfnt_off000461e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x461E7 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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