Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed1b5b1748252dbe…

MALICIOUS

PDF

40.0 KB Created: 2020-08-07 05:10:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f6e85bedf7e4e889803ab3f73a25691c SHA-1: a99b766ffd1d2b972e3a8d85f384cfa2689c63b5 SHA-256: ed1b5b1748252dbed47e182835f714af72bf0c94302f5080eb2b73e9e08ed3ec
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to malicious infrastructure. The ML classifier also flagged this PDF with high confidence. The primary attack vector appears to be social engineering, luring the user to click on a link presented as a helpful document, which then redirects to a malicious site.

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/wb?keyword=maths%20formula%20pocket%20book%20pdf In PDF document text
    • http://files.pearldrumrudiments.com/uploads/1/3/1/4/131438175/judititit_fufiduwora.pdfIn PDF document text
    • http://tamawa.christianinconnect.com/uploads/1/3/0/7/130738714/fixovopobinurixu.pdfIn PDF document text
    • http://files.browndogbiking.com/uploads/1/3/0/7/130739170/wakalikewaz-zenagalukaxusar.pdfIn PDF document text
    • http://pitilodu.truccoaustralia.com/uploads/1/3/1/0/131070872/b2436c0e234b1.pdfIn PDF document text
    • http://files.futurespresent.com/uploads/1/3/1/0/131069886/666591.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/1/0432/5743/0176/files/fizeselezoninimufusamuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0291/9074/files/litoda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7723/7913/files/61895458506.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5567/5552/files/61413210393.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8117/9029/files/literary_analysis_essay_outline.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/98994308000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2338/2166/files/12915918467.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/jafemowitotepogar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3672/8734/files/benefits_of_shared_reading.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6944/6046/files/business_accounting_101.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_off00005523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5523 5604 bytes
SHA-256: 0c6cd44e96952e4a4210d9ae6b9e2871e4c312d5cb03fab1dd3c27d1d027611a
font_01_sfnt_off0000680d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x680D 13832 bytes
SHA-256: 00bb5573bcd400c0a7517122e2a6eafe9142b7f27181716439ff1fcb9b1a0484

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