Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d108a4c0554c4dd…

MALICIOUS

PDF

74.0 KB Created: 2020-08-31 00:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: eab3961c969cd156b06c5479729e7d87 SHA-1: e5a38ee84cb0398a772a5abc64863a864e1d3774 SHA-256: 5d108a4c0554c4dd59a7c2b0030e4d693f288ca747775c40d2ce38c2b7485c54
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a redirector URL associated with malicious activity. The document body, though heavily obfuscated, contains the same redirector URL, suggesting its primary purpose is to lure users to malicious infrastructure. No scripts were extracted, but the presence of malicious links points to a phishing or malware distribution attempt.

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.ru/wix?keyword=%25D8%25B1%25D8%25A8%25D8%25A9+%25D8%25A7%25D9%2584%25D9%2585%25D9%2586%25D8%25B2%25D9%2584+%25D8%25AA%25D8%25AC%25D8%25A8%25D8%25B1+%25D8%25B9%25D9%2584%25D9%2589+%25D9%2585%25D9%2585%25D8%25A7%25D8%25B1%25D8%25B3%25D8%25A9+%25D8%25A7%25D9%2584%25D8%25AC%25D9%2586%25D8%25B3 In PDF document text
    • https://ttraff.ru/wix?keyword=%25D8%25B1%25D8%25A8%25D8%25A9+%25D8%25A7%25D9%2584%25D9%2585%25D9%2586%25D8%25B2%25D9%2584+%25D8%25AA%25D8%25AC%25D8%25A8%25D8%25B1+%25D8%25B9%25D9%2584%25D9%2589+%25D9%2585%25D9%2585%25D8%25A7%25D8%25B1%25D8%25B3%25D8%25A9+%25D8%25A7%25D9%2584%25D8%25AC%25D9%2586%25D8In 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/1a89c8_f8261b787947428f9a9ab9c833c27144.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b98abb_254e89c4ef5647018d0d2449917bb423.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f09a9d_30249bd865184284af4e736806e3e861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5951/0424/files/ashoka_chakravarthy_telugu_songs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4993/4229/files/67532435245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6080/5280/files/aphasie_de_broca.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2074c9_3871859864c84b318064887ad9e1b521.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_d4a6c7a69c2843b4933d898239a0068e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9671/7977/files/university_of_edinburgh_undergraduate_application_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4062/1222/files/vivodip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5345/7320/files/converting_decimals_to_percents_word_problems_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6512/0670/files/35118445627.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4552/8487/files/21249752195.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000dea7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDEA7 32772 bytes
SHA-256: 942c5e0ff9347e51cb0dda894beef08656fcbc5bb770c40e8f7b17d4ea31d9fb
font_00_sfnt_off00009b18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B18 4068 bytes
SHA-256: 457a95d2d1619e609b977429d761152f7d5a3c0fe23271f2bb247fdca2d50445
font_01_sfnt_off0000a8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8F6 18292 bytes
SHA-256: 9290e5152937149c98698349ab92f9dc35373ca11ea9c4d15578f20f7945089f
font_02_sfnt_off0000c507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC507 7484 bytes
SHA-256: c5984f2e107dc20c70b145f9d1f6179f8e2072a9a3235096749114de20ede26f