Malicious PDF — malware analysis report

Static analysis result for SHA-256 7555cbaca9b8e7de…

MALICIOUS

PDF

42.9 KB Created: 2020-08-11 22:53:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bdba00b3bf8b9e039217b08bae24fa2c SHA-1: c001c8168ec0ad55f872befe7b71c7cdd02f4aeb SHA-256: 7555cbaca9b8e7de2e968c667378efd43297de631b5189e801473b32925f992d
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 malicious redirector at 'https://ttraff.cc/pify?keyword=structure+of+dicot+and+monocot+root+stem+and+leaf+pdf'. The document body and heuristics suggest this is part of an SEO link farm or free download lure, designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=structure+of+dicot+and+monocot+root+stem+and+leaf+pdf In PDF document text
    • http://files.lerobles.com/uploads/1/3/0/7/130776358/wosexidikepome-lisoniregobibu-zebufibalupufag.pdfIn PDF document text
    • http://files.poverty-conference.org/uploads/1/3/2/7/132740498/kubutinix.pdfIn PDF document text
    • http://files.adyartcenter.com/uploads/1/3/2/6/132681969/pafedani.pdfIn PDF document text
    • http://files.addiedraper.com/uploads/1/3/1/0/131070450/528ddbe.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/1/0435/5430/8245/files/glider_asw-_27b.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5706/0769/files/tasutawinozadefofora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0662/3903/files/gajakunenip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3759/7607/files/12216840290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7632/9373/files/luxuzufef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9664/3486/files/pisinesudorumerup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4613/2129/files/occupational_health_and_safety_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5011/3943/files/affirming_diversity_nieto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/xunepenukoxutupavoxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/citoneurin_5000_comprimidos_bula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6105/1546/files/tinapefidilawuzawakono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dosoxuwananeworatimuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/wamepamidosode.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68E0 5404 bytes
SHA-256: c6c469f4aa34b7d686157016ba1cfe964d8aa60e325878a374e8740a021620ab
font_01_sfnt_off00007b20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B20 10312 bytes
SHA-256: 3169871ef042980ad70f103d8f9fc67df3108006d00cd446521bfa44250e351f