Malicious PDF — malware analysis report

Static analysis result for SHA-256 b27bef8a712a006f…

MALICIOUS

PDF

47.6 KB Created: 2020-08-29 02:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6b0557d9a6b39f0448ebe84de0742a0f SHA-1: 0cb9b19a97f09d4da8589e663afac63da95a3533 SHA-256: b27bef8a712a006fec74fd5db40e833871e295f7ed1ab965938cdebf33156843
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with a critical heuristic firing for a PDF link to a known malicious redirector. The document body, though heavily obfuscated, contains the primary malicious URL. The presence of numerous links, including to a redirector, suggests an attempt to drive traffic to malicious infrastructure, potentially for phishing or malware distribution.

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/wix?keyword=Auswirkungen+verschiedener+Teesorten 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/b8c837_f81cc0d72986438190d1c685ee02e642.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_d72b41df5afd49369f67247cd0d2f3fa.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_bdc2cf9ebb4d4a149e0e175c238cc992.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_b11e002cb2c94ac19d58f412c992f902.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_2ce3bcebea834af9bfb1ef3d55410540.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1854/2504/files/39131161879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5674/2046/files/83225688469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6797/2515/files/pevunarivusimabevodasosa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/kededoroxozuno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2476/7400/files/geometrical_interpretation_of_integration.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_eebae45992ab439ba4e4491924dd2d86.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_99a05ef4693a485eabdb5b46b23183fa.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_e3fc20c6cc5443b78b1646e33f733bc0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_4e1ead65e6914f5ca61070ed010f43bc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_ca7214c10c1b47438db081708e9ff2ce.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_ecca9774b4e14120a00f63ae7b267244.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_9cf5d56a661243fba9817a90c2b050e1.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_off00006452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6452 5208 bytes
SHA-256: 97751e38ad696236d148100b49e2fa2b562f8633a4a25e9014d31a0d2c54c049
font_01_sfnt_off0000761f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x761F 11124 bytes
SHA-256: b126ce43e512bba4483707bdb9603ab8aabc081f0789fe815932257e4c5c7d6d
font_02_sfnt_off00009a7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A7E 16084 bytes
SHA-256: 2b5e7e198710ce25a9c9facea4da25a8305a97bff148003313a6d74af80700ac