Malicious PDF — malware analysis report

Static analysis result for SHA-256 85afe2ad5432ca51…

MALICIOUS

PDF

50.6 KB Created: 2020-08-30 05:52:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: afd5903bae6aa4e7aac5b42c8cccfb72 SHA-1: 8731cb682b0c9bd8868aeeb09fa1f1e33b4b86ce SHA-256: 85afe2ad5432ca510d71fbdf9cd638a65c27fab0e9e4aee5fefb17e253af0cce
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, with a primary URL pointing to a known malicious redirector. The ML classifier also strongly flagged this PDF. The document body, though heavily obfuscated, contains the same redirector URL, suggesting an attempt to lure users to malicious infrastructure.

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/wix?keyword=compl%25C3%25A9ment+de+phrase+cm1 In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static.usrfiles.com/ugd/b8c837_915fbe5ade9346ce8f67f7844ead7270.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_2fcfb4a00c3547b6955354f727d50ad7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/72b0e7_e40318c1dab2429ba39f79f485165b2a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e2c6c1_cc939a5669aa4fc8989d36864f2d4e23.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_478ef8dea919480d9464e6ab8d2cf77f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/82e28d_4052cc70e6c847b385e037dfabd8ae74.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_48e37fcc113c452f908e00b5c7180b52.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6827/5353/files/98117097078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8721/7311/files/duraheat_kerosene_forced_air_heater_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8704/4510/files/lion_air_boeing_737_max_crash_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7049/6661/files/46166743463.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_eb15028794624703b85401b1264e92cb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_7910ecf8492747a98f9ddf053568d30e.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6138 5272 bytes
SHA-256: 1e62109085e22dcdaa51565600d585f6f266d84c47f881fad3f798e5ba4ae6fa
font_01_sfnt_off000072a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72A7 11884 bytes
SHA-256: 8d0e43ab73b5c2735f7bdaad1c93bbc8973d20d0834734b1908c68d90f537b3a
font_02_sfnt_off00009838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9838 16144 bytes
SHA-256: 4935603ab55f76872287563a9769dd1c174124dacc281fee03fb2e864e4c444f
font_03_sfnt_off0000ad40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD40 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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