Malicious PDF — malware analysis report

Static analysis result for SHA-256 b68c405cbeefdc4d…

MALICIOUS

PDF

41.5 KB Created: 2020-08-15 05:36:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a6550e130bc44765b3458c915d14631d SHA-1: 0381fff0c42db872028870d836ea8fd5d1f84a93 SHA-256: b68c405cbeefdc4d31404f95c89af327205bc48bb51c7ff04a8c2b41ccc04bad
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL and references a popular book title, suggesting a lure. The presence of a link farm heuristic further indicates an attempt to distribute malicious content or engage in SEO poisoning.

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=neil%20gaiman%20coraline%20pdf In PDF document text
    • http://files.tedcoyle.net/uploads/1/3/2/3/132302951/8460d.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/1/0432/2702/1480/files/gugax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2642/3708/files/mufokadetavisuwizorume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5397/9550/files/bruce_lee_s_fighting_method.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2232/5672/files/makro_catalogue_march_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7451/8180/files/16977616290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6901/3157/files/poxajofa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8219/5879/files/fopepituga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3956/1630/files/36129399004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1282/4993/files/15641719352.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_off000065f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F8 5264 bytes
SHA-256: 5c376bccf073ab7fcd1b24f1ed47d83189f6633d13fc11394d00c9a8f64b80ba
font_01_sfnt_off000077c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77C3 10084 bytes
SHA-256: ff58627e525329a22eb83466162f4c981a63018ba6c9eef37f0542d75c2d4952

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