Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1257ab462a98fef…

MALICIOUS

PDF

46.2 KB Created: 2020-08-14 05:57:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0fb56791af241e56d4783763aa135594 SHA-1: b4e9eebfefd4dc8b85042e83cb3f745b1920c1df SHA-256: d1257ab462a98fef01582565fcfbca805f985ce85fff7456c4b5111206bb2dad
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=albania+tourist+map+pdf In PDF document text
    • http://files.e2mvp.com/uploads/1/3/1/4/131482975/monolarus_sadoravomo.pdfIn PDF document text
    • http://bezetube.mindfulneuropsych.org/uploads/1/3/0/8/130814311/zenovikubekumeko.pdfIn PDF document text
    • http://files.burgesslab.com/uploads/1/3/1/4/131453645/kojipawipuviwa_faninubevara.pdfIn PDF document text
    • http://jumata.mysticplanet.shop/uploads/1/3/1/4/131453247/gijefazona-fonexul.pdfIn PDF document text
    • http://files.mamajourneys.com/uploads/1/3/1/1/131163540/70e183e2b8.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/1/0430/3123/2666/files/82354061761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8849/5270/files/aedes_aegypti_life_cycle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5156/3670/files/biodata_philippines_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9725/1235/files/vafafuvewovegoxil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/1385/3599/files/browser_video_ipad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2688/9374/files/widotokilubinodowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99913566500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2313/7957/files/zomisakezuzam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2814/3510/files/nipeduxijulofikimavimuwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/40807113297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3018/4098/files/nonim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/jisepezunuto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9511/3374/files/jivixotekeziwinupilopono.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_off000077a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77A3 5316 bytes
SHA-256: 167fb8c40e8f886d0744ea2ed95c4f72390b1747bafea687db672a09e9b06fcd
font_01_sfnt_off00008995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8995 10128 bytes
SHA-256: 1b609ff3a55dcc7433a73f23383ede82cb21d4a39a8ace03c286754f1546a10c

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