Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4a2040822bfbd1c…

MALICIOUS

PDF

42.9 KB Created: 2020-08-21 13:28:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: da910e5aeb8541601708b60ba407c454 SHA-1: 33f79712fed14c1f12cbe3cad2011af0687869b3 SHA-256: b4a2040822bfbd1ca974420056570a2ba3b8d624dd2828672fe094de22ca5c9e
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=dispersion+statistics+worksheet'. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'dispersion statistics worksheet'. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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=dispersion+statistics+worksheet In PDF document text
    • http://files.pimpernelwharf.co.uk/uploads/1/3/1/6/131606092/4652406.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/1/0439/4863/8363/files/vokawowunumama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/lomifopeki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7447/7464/files/nifugewa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1370/9722/files/93735637395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/35881587746.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3345/1944/files/cade_simu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0219/9203/files/fusimipafozabinurotuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9408/7582/files/garuzovatup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/xepokububug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7587/0613/files/62896482027.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8207/1716/files/37070158676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/46642862558.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 4

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_off00006776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6776 5144 bytes
SHA-256: 56d369bb010a394d5140b2e3e397cf2b4c102b7a59445e321f8483238ee19664
font_01_sfnt_off00007909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7909 10800 bytes
SHA-256: e2e18ba86e94e2d952965231f2a6d5afcc830ea56553cf42e60cfbbdb68f3d1c

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