Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8481ff6a824dda2…

MALICIOUS

PDF

39.7 KB Created: 2020-08-26 23:12:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 942f3bb4790163db11420e2cd22ccb9c SHA-1: 3e15bd049b346adf82ee3185be99d6946240b1e1 SHA-256: f8481ff6a824dda2fd112bd8f7b3c8d46625b4003d997c5a984b51558c114e6b
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is presented with a lure related to 'Disney finding nemo coloring pages'. The document body, though heavily corrupted, also contains this URL and other PDF links, reinforcing the malicious redirection attempt. The presence of multiple Shopify-hosted PDF links suggests an attempt to blend malicious content with seemingly benign resources.

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=disney+finding+nemo+coloring+pages In PDF document text
    • http://files.yamahammer.com/uploads/1/3/1/3/131384173/lazal.pdfIn PDF document text
    • http://files.wyreforestantiques.com/uploads/1/3/1/8/131856945/4cd1f4191a.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/1/0433/4629/6985/files/23131518776.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1779/5741/files/astronomy_and_astrophysics_solution.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6080/3237/files/sample_community_health_needs_assessment_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/mojapetomoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4797/5062/files/xumikasevoxamum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2512/9891/files/78879822978.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3735/1326/files/gofir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1418/3323/files/autograph_kannada_film_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/98387322603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2642/3708/files/absorption_versus_variable_costing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6171/3813/files/jigatadawe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4827/9957/files/11898356580.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/23871483671.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_off00005bc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC8 5576 bytes
SHA-256: 02d6c91543090c5d7b37fa55cf4506410fc8a81098f9330fbe4f6cb3f81eb4cf
font_01_sfnt_off00006ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA7 10444 bytes
SHA-256: f30d49f4d452cb6dc4131f52cb36511b8dda9824591d43063454e6bb46a534a8

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