Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af404f708262496…

MALICIOUS

PDF

40.3 KB Created: 2020-08-15 03:52:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 52a078f476c3421e54c83f752d175ece SHA-1: 703a3be8dd24e9c0d9638b02adbbaa23f8b8412e SHA-256: 4af404f7082624965336fcb4690dd0ab62bc46eddb1f76445c8d6f182b157c87
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 redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.com. The document body, though partially corrupted, contains text related to 'Movimiento parabolico ejercicios pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The presence of a link farm further supports the malicious nature of the document.

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=movimiento%20parabolico%20ejercicios%20pdf In PDF document text
    • http://files.kortarsmuveszet.com/uploads/1/3/1/8/131856664/vimaretanizig.pdfIn PDF document text
    • http://files.klayworks.com/uploads/1/3/1/4/131437087/damew.pdfIn PDF document text
    • http://files.transcendedministries.org/uploads/1/3/0/9/130969242/firiped.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/1/0439/2851/8824/files/83062731345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3365/7498/files/vawiwetax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6857/8210/files/79911396912.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/43630710882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5308/0991/files/pejiwabenefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/18602200230.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/ludebiwanonolaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3287/1074/files/usps_change_of_address_form_printable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/vavidaxafefuzijozub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2988/1244/files/mipisav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0525/5577/files/44577477866.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3284/5207/files/32867874599.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 7

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_off00005d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D83 5584 bytes
SHA-256: 69e2806a52f5102c3cebdc0f0e5c1a61877a47585cac4df12bdc0a6f0042827b
font_01_sfnt_off00007069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7069 10504 bytes
SHA-256: f4a3970ed9a90f6914fec1f28640c3fa84087842cab4aac964de480df278fa78

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