Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dea19b8f5be0d97…

MALICIOUS

PDF

43.6 KB Created: 2020-08-14 22:48:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a38aae8aab14de4be0ca6808400572b4 SHA-1: 2d8837ae9cf4c755c42317c854b885a25df4edf0 SHA-256: 9dea19b8f5be0d97d178d0f8ebf2ef9b5f99a67e10fe539736efa253b7c66730
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.cc/pify?keyword=clearing+cache+chrome+android In PDF document text
    • http://files.ogilvies.scot/uploads/1/3/0/8/130873822/3082025.pdfIn PDF document text
    • http://files.mightyfortressinspections.com/uploads/1/3/1/4/131437307/0b9c0f0c2.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/1/0434/7294/5304/files/verb_to_have_present_simple_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2502/2621/files/90740845748.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7156/1116/files/46452142111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/path_of_war_expanded_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40169505762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/data_structure_and_algorithmic_thinking_with_python_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/foxtel_go_android_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/fexifalufunelavosino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/jesatokudulapopebunuroluw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2506/2298/files/vorapilasaxidi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7546/0515/files/regrouper_plusieurs_en_un_seul_sur_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7386/3829/files/50906745892.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2992/8872/files/revolution_season_3.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_off00006bbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBE 5080 bytes
SHA-256: 97abdbca672e8553c043e98ca1528c0727deed708b541fb1252256b17a1297ef
font_01_sfnt_off00007ccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCB 10388 bytes
SHA-256: 01660fd77b9ec026b5b46c38e929f953b167918857df15a436d127f598bcc02b

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