Malicious PDF — malware analysis report

Static analysis result for SHA-256 77ce4539ed49efda…

MALICIOUS

PDF

50.5 KB Created: 2020-08-11 01:06:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aa1e9dbc0de4ed43eb9ab0cc6eb1c6a2 SHA-1: 84cea28c81c29d09d1b4576db691de22e94cd31c SHA-256: 77ce4539ed49efda0c8b78b3fdfd7b40107abbe92924b1b30cc88d9290d4e444
194 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a primary link pointing to a known malicious redirector. The document body and heuristics indicate a link farm strategy, likely to distribute malware or conduct phishing. The presence of numerous links, including one to a malicious redirector, strongly suggests a malicious intent to lure users to harmful websites.

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=acuerdo+de+paris+cop21+pdf In PDF document text
    • http://files.designsbycarolann.com/uploads/1/3/0/8/130814513/ac27058e6e8.pdfIn PDF document text
    • http://files.mlrmasterpieces.com/uploads/1/3/0/7/130776460/d2a7b4a2cd6.pdfIn PDF document text
    • http://files.thebattleformaumauisland.com/uploads/1/3/1/4/131438018/823128.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4651/0497/files/konsep_bilangan_bulat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6911/1461/files/slam_by_walter_dean_meyers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2008/2590/files/famifezolijiposedidibig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7246/1727/files/xixusomizoperob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lugapib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/68540954385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8821/6217/files/gisororinikoduxujazad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5540/7519/files/xofipigeto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4385/4235/files/wd_my_passport_driver_windows_7_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/zakofatura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4681/3344/files/75020343475.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77A3 4988 bytes
SHA-256: e75eaf312be461a3d4813553cb01e027acc929f2037004317c90602d0bf9df81
font_01_sfnt_off000088a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88A9 11268 bytes
SHA-256: dabec045f89e823a0630f225de1b0cce0de7c55cdf109ed95f3630d322fb01ed
font_02_sfnt_off0000ad7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD7C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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