Malicious PDF — malware analysis report

Static analysis result for SHA-256 33ff5231365c06d6…

MALICIOUS

PDF

46.6 KB Created: 2020-10-08 14:55:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: db7cbcdad4f8af1c2e37345ebb05f5fe SHA-1: 2ad892a628b39ec6fe97d5e36a9355146f10b5c3 SHA-256: 33ff5231365c06d61bfb0214c7a671086a182105d9e9ca8bc968d85dbe5862ad
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.me/pify?keyword=iron+golem+recipe In PDF document text
    • http://files.slowlywakingreason.com/uploads/1/3/1/6/131606755/lolosogodedow-sopusobavawi-nigebaxes.pdfIn PDF document text
    • http://files.piranhadiving.net/uploads/1/3/1/4/131407370/2533076.pdfIn PDF document text
    • http://files.stutteringacademy.com/uploads/1/3/1/4/131437823/6c673.pdfIn PDF document text
    • http://files.dndamsels.com/uploads/1/3/1/1/131163851/venos.pdfIn PDF document text
    • http://fepuf.venturabeachcottage.net/uploads/1/3/2/3/132302912/8287994.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f770843b-c12a-44d5-a8de-8566bd47bea2/gewomilixiwikipalukobil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/568a10ba-a535-4c4f-831b-52ba0f0804ba/legedizafepozesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/904c2cba-61d2-46bc-8011-92a684749a1d/24573373968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab770ebb-c3f5-4a99-ad8d-b68bc9a1c6cf/33101775182.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f6a3611-7bc1-49a3-8b73-1e22fc2a9d80/sukojevovosikeko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5937/9875/files/a_field_guide_to_animal_tracks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8841/5394/files/kejoborazalaxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9651/4461/files/gmd_auto_hide_soft_keys_pro_apkmania.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1035/4075/files/cabbage_family_plants_crossword_clue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/wii_channel_installer.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0F 4804 bytes
SHA-256: 6f2c22f908b3c6b3cbec08dfea90ad24c652a0a02061ce45250ce224a89e6468
font_01_sfnt_off00008a5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A5C 10280 bytes
SHA-256: 21f6c3a9676ced85e4a6ed7898bf1f56a7c6b0d48d7c5a0c9e70171950a5079f

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