Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc351cc68f05196…

MALICIOUS

PDF

38.8 KB Created: 2020-08-15 03:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 783f31c33f7c12bc3f6e7c0f83ec2a73 SHA-1: 3fc3fb5a6c69b12f146387bd112a66579cafd189 SHA-256: ccc351cc68f05196e81a67a729319d46ac27d3efca255a15646d619555a484d9
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector. The document body, though partially corrupted, includes text related to 'esl grammar worksheets' and the malicious URL, suggesting a lure to disguise the malicious intent. The primary malicious IOC is the redirector URL, which likely leads to further malicious 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=esl+grammar+worksheets+intermediate+pdf In PDF document text
    • http://files.afiniadentalportal.com/uploads/1/3/1/3/131384070/rigofelive-xejapim-dikepawesodozir-mebex.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/1/0430/9575/2864/files/pezuwagabawasiwokituxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4785/2959/files/15740074073.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8770/6777/files/card_maker_for_mac_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9986/5756/files/antimicrobial_activities_of_garlic_and_ginger_extract.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4547/7800/files/7526750974.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0381/3781/files/fox_halftime_report_cast.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2341/6995/files/android_x86_emulator_not_starting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6742/4412/files/rafovilolifidosifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1290/5370/files/11434643260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4246/4166/files/99923599908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7813/2636/files/numimalarogopivilufaseli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/lefesuzufone.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 3

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_off000059a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59A9 5568 bytes
SHA-256: 37eb5b7f6b039395cc81020eb89ddcbb278c175b77a513bf7ccb6361390113d4
font_01_sfnt_off00006c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C88 9956 bytes
SHA-256: e5a03de2167aa02eca877b3a59fc2499593a3d3b3f63f745df8099b3b6a8c718

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