Malicious PDF — malware analysis report

Static analysis result for SHA-256 7999d4c52fbffc48…

MALICIOUS

PDF

57.9 KB Created: 2020-08-29 21:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 468ae7c542f5078eb63c3bca931a1ab5 SHA-1: 18830fb1c899387f6745eac1eb4c70be744eec43 SHA-256: 7999d4c52fbffc48cf0ccebc053b21bba1d44aeeb45170c99a720d129c6440f2
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to create an SEO link farm, with a primary link leading to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. This indicates a phishing or scam attempt using a lure of free downloadable content to drive traffic to a malicious site.

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.me/wix?keyword=fichas+para+imprimir+medidas+de+longitud+primaria 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_c52825cdeb7a4195b3b19cbfbc2a66c6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_dd7226e5cab04f9282ebfb61cebba8a7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_75560a67bc894a448044a18ddd58077f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_80af681399124cbe9b894ce3f21d82c8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_4a0d3bf25dd049388d06aee2dfef8673.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_edfd736b7b72421ea60e97ff0a21e8e9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_1124598a48d94bf580c3318371b091c7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_7b45f645a8f446e1a05ee991c4a83db5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_d3e468f27454497a9e4fd1777e1e35e2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0a052f_0991887cbee84f9ba9a17f0e617ffa03.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/63d3ad_8a5494aab0044f4e93801e6a0c1f0051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3745/6534/files/divorce_in_islam_in_urdu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/6336/2980/files/education_logo_templates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15501301831.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 3

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C02 5444 bytes
SHA-256: 78718a5d492c361eb5b76c442ebf5ed596c95b5a34f4c93440ebe7d0c3858fd6
font_01_sfnt_off00009e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E5A 11340 bytes
SHA-256: 60c19b631693ac3edf31dbd37e88553abb3ce10495e7a4990483a706d6faa63d
font_02_sfnt_off0000c306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC306 16124 bytes
SHA-256: 25b4721464b7316f01e21ed2c3faf4040515a2c9bdaa67695c41ecc6d6989cce

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