Malicious PDF — malware analysis report

Static analysis result for SHA-256 876a43e56cf8d3f5…

MALICIOUS

PDF

49.8 KB Created: 2020-08-06 20:32:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 73b95b45a989fefdb066835d60f84d48 SHA-1: 2817be77ce843bfb0cd1b1f611503ef951bad855 SHA-256: 876a43e56cf8d3f5cccfef6bd78a8b462125e90f5b8439ffe55a72dca46a4ac8
194 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to a malicious redirector at 'https://ttraff.com/pify?keyword=national+skill+development+mission+pdf'. The document contains a large number of embedded links, many of which are SEO-optimized and point to external PDF files, likely to obscure the malicious intent. The ML classifier strongly indicated maliciousness, and the presence of redirector links confirms 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.com/pify?keyword=national+skill+development+mission+pdf In PDF document text
    • http://vixafep.cadrc.org/uploads/1/3/0/8/130874232/kuxanadad.pdfIn PDF document text
    • http://files.menasgerovei.lt/uploads/1/3/1/8/131856771/jexexipawupap_walivev_duwukubikeluse_vubexogoxiziv.pdfIn PDF document text
    • http://files.keepcalmandkickals.com/uploads/1/3/0/7/130776449/niviz.pdfIn PDF document text
    • http://zakibuno.slateproject.org/uploads/1/3/0/7/130738531/vagaxu_webese.pdfIn PDF document text
    • http://files.jcmcgiff.com/uploads/1/3/1/6/131636737/e02791e2772a733.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/1/0438/2107/2546/files/smash_1._1._4_patch_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3665/5259/files/ravens_vs_jaguars_live_stream.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0403/5221/files/organismos_autotrofos_y_heterotrofos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/9947253642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1653/4685/files/31595902116.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8605/2518/files/47579511163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/pikuxuvidosawevebav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6998/9279/files/15738873804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3546/7669/files/51790827669.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78539107281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2036/1629/files/nugap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/mubewari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/spinning_instructor_manual.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_off00006f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F64 5184 bytes
SHA-256: ad3881f79bc4ffe39ecd73cc031dfb2debfe977a0e396477c28685f8fc4b317b
font_01_sfnt_off0000810b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x810B 10320 bytes
SHA-256: d65146020935953c5e976f579840f6c27f4112e30c5405b239f01607ff6d29ff
font_02_sfnt_off0000a495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA495 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e