Malicious PDF — malware analysis report

Static analysis result for SHA-256 81a0a92c30353ab3…

MALICIOUS

PDF

52.5 KB Created: 2020-08-15 14:08:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fc75f3e0d17cad7a555d0898cf2addac SHA-1: 18a03c737172a7ea33b4643bf0650792b5b8da49 SHA-256: 81a0a92c30353ab3ad10724c4fb389919de01e6221876becc4a8c68618e67e41
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service, which is indicative of a link farm or phishing campaign. The primary redirector URL is https://ttraff.com/wb?keyword=new%20testament%20ancient%20greek%20pdf, which is flagged as malicious. This suggests the document is designed to lead users to malicious content, likely for credential harvesting or malware distribution.

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/wb?keyword=new%20testament%20ancient%20greek%20pdf In PDF document text
    • http://kekukim.luco.org/uploads/1/3/1/6/131606758/lenoxesu.pdfIn PDF document text
    • http://resivigex.lllofwi.org/uploads/1/3/0/8/130874431/9333798.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/1/0434/3146/1016/files/rufewebibonurubekikobu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6318/0438/files/turojug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5113/8715/files/libro_quimica_inorganica_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3171/4202/files/4748978806.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9254/8511/files/el_almohadon_de_plumas_descargar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7537/1159/files/gugugiseboved.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5860/9817/files/enter_sand_man_guitar_tab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/lawodul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/8310630395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1514/2551/files/kakapusiwiximagozamozat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8011/2545/files/18363241670.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

Related samples 1

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C6D 5568 bytes
SHA-256: 8d5e099a71b31f860cc5125deb311b3ec006831567d5681e434413dd25b3c379
font_01_sfnt_off00008f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F5F 21768 bytes
SHA-256: 10a84d721e3298a5fe802a164b00983f5ac76b7a978eb185debfc1281ad00011

Open this report in the interactive analyzer, or submit your own file for analysis.