Malicious PDF — malware analysis report

Static analysis result for SHA-256 63d7f2255f77b64c…

MALICIOUS

PDF

50.1 KB Created: 2020-08-07 17:32:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7abdf0900a080c6ab64e19853258972c SHA-1: 22b430cb0718c16591e3fbd15f00a57afbd11a4f SHA-256: 63d7f2255f77b64ca70e6ad649833886c34cd2e261c555bdcf6bdeeeccf5662b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, specifically pointing to `https://ttraff.ru/pify?keyword=student+tardiness+questionnaire+pdf`. The document body, though heavily obfuscated, contains text related to a questionnaire, suggesting a lure. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports 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=student+tardiness+questionnaire+pdf In PDF document text
    • http://files.ithacahoneyworks.com/uploads/1/3/1/3/131383649/2509888.pdfIn PDF document text
    • http://molawem.albanyareacatholiccommunity.org/uploads/1/3/1/4/131453416/relomajezebaxonodu.pdfIn PDF document text
    • http://files.franklalumia.com/uploads/1/3/1/4/131406082/3496536.pdfIn PDF document text
    • http://files.soyouknow.info/uploads/1/3/1/3/131380440/bigozig.pdfIn PDF document text
    • http://wokubi.martynsmondayclub.co.uk/uploads/1/3/1/0/131070450/dizovutotitukonadan.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/1/0438/2402/1664/files/caudillismo_en_latinoamerica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4976/2459/files/binocular_vision_anomalies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3846/6467/files/juwebexapemawete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5387/5357/files/30913518206.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1988/3928/files/40337669151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/understanding_telecommunications_business.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5677/5839/files/75106719471.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/21771857839.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5847/0813/files/48547618271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/62686473050.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8116/9051/files/ordo_hemiptera.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_off000086d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86D0 5232 bytes
SHA-256: 5212cd7db2f68cab7f6691f15ca9251e4b7349991ba175cfef9d4c20a8639b9c
font_01_sfnt_off000098a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98A7 10088 bytes
SHA-256: 35f416ec1d7f1884a80b21a538505b46a408ca3d476d268e67f74cd57d781790

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