Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aadd3ba9afc70b3…

MALICIOUS

PDF

44.6 KB Created: 2020-08-26 04:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 11cc896055f247bd1c9c822aa65cd173 SHA-1: b1afb42b5ddc93c77464a821a2647f10d7867472 SHA-256: 4aadd3ba9afc70b3ee9e59a956cfc92d6857c8b9ab762e801cf05dc02a978f4d
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.com/pify?keyword=magic+treehouse+books+free+download In PDF document text
    • http://files.bluewaspcreative.com/uploads/1/3/1/1/131164479/2063030.pdfIn PDF document text
    • http://files.piasiagallery.com/uploads/1/3/0/7/130739809/sumusefik.pdfIn PDF document text
    • http://files.highmarkcompanies.com/uploads/1/3/2/3/132303209/2345962.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/1/0463/0331/4080/files/fiscalit_assurance_vie_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/43965115942.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/statistical_methods_for_economic_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0675/3948/files/pukudakumoboti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1150/4288/files/picsart_app_for_pc_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9382/7485/files/75036672076.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6469/6732/files/minecraft_mythical_creatures_mod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6732/6112/files/76189686381.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7328/1948/files/65685491839.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/53813555584.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/33449723276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6957/8147/files/wedding_planner_handbook.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000588e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x588E 5584 bytes
SHA-256: 61f1b8fbfae6f2a750b0fbebc846faae90df08b194cc1ce25f1c1ebad14ad4ae
font_01_sfnt_off00006ba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA5 10540 bytes
SHA-256: 41f7e0d89022db39496dcba690c1a967a664609df40203a04bb4461a4422ca6a
font_02_sfnt_off00008fdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FDC 16184 bytes
SHA-256: 520cf16680d7342796445bebc485610b3924acb826530e625dea20c479cebbae

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