Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca6bacce9051f7d…

MALICIOUS

PDF

53.8 KB Created: 2020-08-10 03:28:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 371682092c7ba644ecda27bf06d0ad6e SHA-1: b64eee78d15984ef839ea199cd07ad44d4707b06 SHA-256: cca6bacce9051f7d50cdf028e93513039a425647d03c48208b8e4f17a920103d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains embedded links, one of which points to a known malicious redirector (ttraff.com). The document body, though obfuscated, includes text related to 'pediatric fever of unknown origin pdf' and the URL itself, suggesting a lure to a malicious site. The ML classifier strongly indicated maliciousness, and the PDF structure exhibits characteristics of a link farm designed to distribute 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.com/pify?keyword=pediatric+fever+of+unknown+origin+pdf In PDF document text
    • http://files.graciebarramarlborough.com/uploads/1/3/2/7/132741382/xemezakesimuxiduxem.pdfIn PDF document text
    • http://jagiwo.apicintermountain123.com/uploads/1/3/1/4/131406286/golujusadug.pdfIn PDF document text
    • http://files.yes-bin-drin.com/uploads/1/3/1/4/131437477/173a8b074043f.pdfIn PDF document text
    • http://files.cuestacollegerodeo.com/uploads/1/3/1/3/131383621/zeweruvodunewekeribe.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/1/0430/5528/4378/files/23743734480.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/69329695337.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7537/1162/files/seralewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8277/6729/files/15058534923.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/blank_page_insert.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/ielts_writing_task_2_samples_academic_band_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9289/4105/files/poduburid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4691/9579/files/41824505151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/17837705950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/bezoxodulililodelejezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/12973136625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7107/6520/files/impact_of_globalization_on_teacher_education.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 8

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_off00009344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9344 5332 bytes
SHA-256: d1c87643023002d573096c2b695acc2ac6de6b20e83074379c41304f58192b54
font_01_sfnt_off0000a59c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA59C 10620 bytes
SHA-256: 14d163f591a8e3d9d268c9d6720506e44aaed9c975086134b94ced5f2ef98cbc

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