Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab8503e93f365ea4…

MALICIOUS

PDF

43.1 KB Created: 2020-08-24 03:10:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 30ff8957ddaae5a77fc5a40346ced1a9 SHA-1: dc3082f0e36530888c65d7777ae883269013ea0c SHA-256: ab8503e93f365ea41da2d8d6c539e81c2eba8cd45219097b3f3e0f90af2971c9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL, which likely leads to a further stage of the attack. The document body contains metadata that appears to be obfuscated or corrupted.

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=acrobat+amtlib.+dll In PDF document text
    • http://files.forcebrewery.com/uploads/1/3/2/6/132695200/5bb2eb6533fe68d.pdfIn PDF document text
    • http://files.deborahmilesdesign.co.uk/uploads/1/3/2/8/132815054/kikufavosapa_wumidodeje_mitulu_nikaluwexur.pdfIn PDF document text
    • http://paxajet.oxfordstation.pl/uploads/1/3/0/8/130814328/98556.pdfIn PDF document text
    • http://files.malawiecosolutions.com/uploads/1/3/1/4/131408170/1605936.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/1/0430/3316/5986/files/76752722972.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/2461/3275/files/biographical_data_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7244/4823/files/gujovakevowin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6807/0815/files/manipulative_psychology_101.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6758/0322/files/88448197876.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6728/5408/files/bulozimodijovomujuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9461/4940/files/siwes_report_on_computer_maintenance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9906/2426/files/ctet_2020_syllabus_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0998/2107/files/23672320043.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3113/4365/files/fevupade.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 8

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_off0000653d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x653D 5068 bytes
SHA-256: 6f230dfbd4c15c9e16a3dea175ef8eb643d06464c8b2aba9d465d911df4d42fc
font_01_sfnt_off00007658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7658 13100 bytes
SHA-256: d949c8ece70fa1bd17a15f60374fa8354ec6a27a8e1770a0d9ddf0aa7c6b47f2

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