Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc3064c43610bda…

MALICIOUS

PDF

56.5 KB Created: 2020-08-06 19:31:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 943af31ad7882292913cc31f420f7a02 SHA-1: ed611111e67e0be22617038d5a19bb205b1bb4aa SHA-256: 5cc3064c43610bdaf822a0ce5aa0735bf120dc2b65843bdf2af6f188d957b319
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links, many of which point to a redirector service (ttraff.cc) known for malicious activity. The document body, though heavily obfuscated, contains a URL that appears to be the same redirector. This suggests the document is designed to trick users into visiting a malicious website, likely to download further malware or engage in phishing. The ML classifier strongly supports the malicious nature of this PDF.

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=aula+internacional+1+nueva+edicion+soluciones+pdf In PDF document text
    • http://vexubunuv.sterlingsoccer.org/uploads/1/3/2/6/132680813/9215419.pdfIn PDF document text
    • http://files.newparanormalinvestigators.com/uploads/1/3/0/9/130969653/8380982.pdfIn PDF document text
    • http://files.yesternoir.org/uploads/1/3/1/3/131384249/tamezabunozape.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/1/0431/4251/2802/files/pafazisiwukumebateliwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6424/5922/files/xupizow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5393/2966/files/vilofuxitowavonarilazaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/pelelemopoba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6926/7354/files/wazawosugefuxudinuge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5150/0188/files/94244516262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4887/6697/files/prefix_and_suffix_worksheet_for_grade_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mevebetivegukubevam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0005/2387/files/40752746476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4138/0762/files/92474620259.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4189/1238/files/35307434970.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5680/8607/files/96769442114.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 5

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_off000099a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99A3 5252 bytes
SHA-256: 14e1e8dc30187f714f2dfd2f43a9aff8627202682b1927671ec3ccb18f3e8b45
font_01_sfnt_off0000ab9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB9E 12172 bytes
SHA-256: b13d3cedde64436f31f978b29ab970ae83ddbc1dc21742b94f5d73bcde18c9d3

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