Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ef7ea1a6cd50d83…

MALICIOUS

PDF

57.2 KB Created: 2020-08-14 14:15:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ffacdacd5e3e8f5e2afec783cf1e764f SHA-1: 56867103e27e7d611cd3dca33c2341b4cc106ace SHA-256: 5ef7ea1a6cd50d839b83da6dcb2ae7bdef29c9b063c0c7814d650a5c78bfcb25
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to a redirector service that is associated with malicious activity. The document body and embedded links suggest a lure for free downloads, likely leading to a phishing or malware distribution site. The primary IOC is the redirector URL, which is used to obscure the final malicious destination.

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=ayatul+kursi+bangla+meaning+pdf In PDF document text
    • http://files.bengonzalez.com/uploads/1/3/1/0/131070459/jozivinir.pdfIn PDF document text
    • http://files.northernnerd.com/uploads/1/3/1/3/131379680/wobifopedufinu_beruwedorelixif_kugepa_gakofus.pdfIn PDF document text
    • http://files.amesburyschoolcoalition.com/uploads/1/3/0/7/130739593/c02159ecdc.pdfIn PDF document text
    • http://files.zacharyleophoto.com/uploads/1/3/0/8/130814423/597e6ce.pdfIn PDF document text
    • http://files.thewondermart.shop/uploads/1/3/0/7/130739264/5ba55a98.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/1/0433/3866/2053/files/72314712677.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7631/2471/files/87519954184.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2065/6545/files/pixudimimasinetobuxof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5320/3102/files/44475454300.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/legubukivegad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/demubeseduxawaxupara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6246/8516/files/zitobatuxamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1437/4047/files/bamub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1072/6815/files/wuturetelu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6616/2341/files/35861465474.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9199/2481/files/holy_quran_with_bangla_translation_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7492/9319/files/39296291445.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000aa36.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xAA36 24384 bytes
SHA-256: 928683cc9b651b910e6d53e7f45111edcb4b52cf5d07a34fcb2b346d99aa0f1f
font_00_sfnt_off00005d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4E 5656 bytes
SHA-256: 0dbbf101547eeab68859358b311312ef0f09cec8369ced0f775a679cb7d85355
font_01_sfnt_off00007076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7076 7404 bytes
SHA-256: 3a6a84b58a623cf6f18b6568653a25163af1decaa18e583617e30960f34a1b89
font_02_sfnt_off00008819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8819 9896 bytes
SHA-256: 13ec6bdc9e1b9f3a943afce936c1b523229abdf3c1ad8ed739af7c48b9af33fe