Malicious PDF — malware analysis report

Static analysis result for SHA-256 850e4452f2e290f1…

MALICIOUS

PDF

115.0 KB Created: 2020-08-06 22:09:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e801579d556a9d7b537a32e7570b1c02 SHA-1: 3a5482e740bc6f6fb7a8b3f7f5c338b62f520f3c SHA-256: 850e4452f2e290f1583911e5ca69111887e91c3258ce6631e0c191b23efe01d4
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, pointing towards a phishing or scam attempt. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics, confirming the redirection attempt. The primary malicious URL identified is https://ttraff.ru/pify?keyword=callese+y+venda+pdf+download, which is used to redirect users to potentially harmful 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.ru/pify?keyword=callese+y+venda+pdf+download In PDF document text
    • http://nisolu.fourseasonsbeautysalon.com/uploads/1/3/1/8/131856257/19a6d407c957e.pdfIn PDF document text
    • http://files.kathrynhumphreys.com/uploads/1/3/1/3/131380717/1521771.pdfIn PDF document text
    • http://files.edutobest.com/uploads/1/3/1/6/131636677/xutunatume.pdfIn PDF document text
    • http://files.learnenglishspelling.com/uploads/1/3/0/7/130739376/0e1b31.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/1/0427/9762/9596/files/92112531282.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0809/7436/files/77601139313.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6409/8970/files/zaxefibejov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/gipusididivifeveriman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4802/4741/files/sertifikat_akreditasi_universitas_indonesia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7354/4093/files/8th_grade_math_final_exam_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6653/0721/files/1068944048.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2417/7576/files/wufosusisatiburusilix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0595/8565/files/xobezoda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6563/8048/files/31726720161.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_off00018666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18666 5100 bytes
SHA-256: a48cf085d5740d8a2ea785c62227ba172c1af60eca5655131c2397d8fa188457
font_01_sfnt_off000197f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197F1 10924 bytes
SHA-256: 239cd19b3448fb4f131b71b47a83a759ccb24ee2bc2910d8981119653e8c8a35

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