Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d36618e4568c769…

MALICIOUS

PDF

43.1 KB Created: 2020-10-07 07:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d28ac557e3f38fa4fadcf2eefc64d75c SHA-1: fd55e67797ddc78f7696c7ed7e2e465d8b9c5bcf SHA-256: 9d36618e4568c769b14f60737687b126b035eff7338bd17a43cd86bea0148a06
194 Risk Score

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.club/pify?keyword=black+owned+wife In PDF document text
    • http://files.teachingcello.com/uploads/1/3/1/3/131398231/8601266.pdfIn PDF document text
    • http://files.beadsbybrandy.com/uploads/1/3/2/3/132303001/wefozisilef.pdfIn PDF document text
    • http://pufute.msutaekwondo.org/uploads/1/3/2/7/132740309/8dd057145e24.pdfIn PDF document text
    • http://files.kungfuspokane.com/uploads/1/3/1/3/131380564/jigesekiropomonodovu.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/1/0483/7906/8567/files/sawekulegitux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8722/3198/files/bupa_running_training_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5509/5716/files/redstone_kerosene_heater_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/7481/4620/files/rohs_smart_watch_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/pigaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3da893a3-629c-4521-8910-70a6ce68c359/47907231303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e821b354-9745-4892-97a5-bd101cdd4bdf/53367920890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e91a2a36-5c5e-4dc9-87b2-4f0b2c71a5ee/61596862953.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95d37603-9378-47ea-a846-dffc28522742/zuwexufoxezosotojalena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3295/1446/files/58437900767.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/7543/2348/files/ragisibozedon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8512/8090/files/ddo_spell_resistance_items.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E46 4656 bytes
SHA-256: 62fd5cdf7cc5f18b526dc423bf1c50e1762b65f00c1150ff30c905b6ab18d1cf
font_01_sfnt_off00006e32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E32 10272 bytes
SHA-256: fcb566f80e51c14e910f65406f1e0d4c2f58b6405ee73fcd1d3d14545ef6cd21
font_02_sfnt_off00009163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9163 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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