Malicious PDF — malware analysis report

Static analysis result for SHA-256 fccc6556c7a112cf…

MALICIOUS

PDF

68.9 KB Created: 2020-08-15 04:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fcf808a63734ca5c1337f401fa8e548b SHA-1: 95943bfb52df564237cdc486a6fabbc61a4b129b SHA-256: fccc6556c7a112cf58e590fbf9e3dcce88f8e848d4ddb2a30baf0d3ce8929028
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged as malicious by a machine learning classifier and contains a large number of embedded links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm. The presence of numerous external links suggests a phishing or malware distribution attempt.

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.ru/pify?keyword=school+counselor+mandatory+reporting In PDF document text
    • http://files.capehornvet.com/uploads/1/3/0/8/130813821/3713564.pdfIn PDF document text
    • http://files.rachelkoren.com/uploads/1/3/1/3/131383318/cababd6d630.pdfIn PDF document text
    • http://jinugowaz.jtfas.org/uploads/1/3/2/7/132740285/jivalazobeka-doganikezewa-dadeduzupum.pdfIn PDF document text
    • http://files.diamondpeaksalt.com/uploads/1/3/1/1/131163846/juxivawefisoje.pdfIn PDF document text
    • http://nerurimov.myexpressionsoflove.com/uploads/1/3/1/3/131398560/36bc159a40773.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/1/0440/2066/2422/files/college_algebra_by_sullivan_9th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8370/1151/files/smell_yo_dick.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4883/6004/files/diablo_1_abandonware.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0803/1893/files/putilavova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7955/7529/files/turemijeligejobezabewot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7181/3285/files/alimentacion_complementaria_minsa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8266/1532/files/vusavo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1219/4463/files/alarm_app_using_android_studio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/agglutinine_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1227/5870/files/xosexupopudaw.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 6

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_off0000cfee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFEE 5692 bytes
SHA-256: e4f0e32cba4e3317921b8001ec90c71d9f01d83a8fda33d21223d395bd09c2dc
font_01_sfnt_off0000e315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE315 10376 bytes
SHA-256: 738bc356f9f98cfc7aad0964d8b7c288f97ebddb392e3827fbb5df69765b52e1

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