Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cae999665d308c4…

MALICIOUS

PDF

32.6 KB Created: 2020-09-07 17:09:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9217d41439c11f6f855cc199a163614f SHA-1: 3dd5c22d266ad31a41de778511e2f5b0c922949b SHA-256: 2cae999665d308c49dd72bc9f946649952a2ecfd8d698b2b7ffa519239e42a11
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=catalogo+sandvik+torneado+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/e745be_e6a1753bab844054ae5a09ca1f50d720.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5c8b2f_9678c593d55049b78c594c30cfc7532a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bc84a3_3ddda6b189f8432a9901011cf1d21591.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ff2e72_019330827401439ab577c227cbf814a5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5d2cf3_7e2b5bdd5dff422abf561afe660a3de0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/957eb4_2d1209faf9804acd8c65ecbfa8bcbef9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/735189_18ba36922e804b5f9035aea2bb35fe1b.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4173/4307/files/supik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7673/8462/files/teremejituro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3564/8409/files/27039678243.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/lolojimomonobozot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9560/3862/files/fozivoxavupirafetodovefi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9162/4096/files/9th_std_tamil_guide_new_syllabus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7245/4810/files/kiwiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7189/6741/files/50789753182.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2812/7637/files/canadian_citizenship_application_form.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_off0000435d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x435D 5236 bytes
SHA-256: b434258eb256735dd7720084a932b0e4aaa0f4be19fc96db17567b6c250c021f
font_01_sfnt_off00005542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5542 9564 bytes
SHA-256: ffc33e628b0805136bbe7652951c814ee31ff8f42d5d4e99377f7bb23a62bcac

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