Malicious PDF — malware analysis report

Static analysis result for SHA-256 4282c98e177505c2…

MALICIOUS

PDF

42.1 KB Created: 2020-08-16 21:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5f0a30af65335a67b4d6db2f46c75def SHA-1: 56fe97bf7921a7bb21b48558c22f8e6f6acbbbf2 SHA-256: 4282c98e177505c2b2f167f40c7b18ea8fed545b4801c078ec2f5764bd21e4f5
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to lure users into downloading PDFs, with one critical link pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to downloading free PDFs and includes the malicious URL. This suggests a phishing or social engineering attack aiming to redirect users to malicious sites.

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=cristianismo+puro+e+simples+pdf+baixar+gratis In PDF document text
    • http://files.cognoscereconsult.com/uploads/1/3/0/8/130874304/navawogi.pdfIn PDF document text
    • http://files.iatbr2018.org/uploads/1/3/1/1/131163733/wufixiwufosawijewi.pdfIn PDF document text
    • http://files.partscare.aero/uploads/1/3/1/4/131454620/ginoxaja_mosozina_lumuburonulu_gadulopu.pdfIn PDF document text
    • http://vagev.bradfordalliancechurch.com/uploads/1/3/0/7/130775320/3de29ef3515.pdfIn PDF document text
    • http://files.samanthamesserartist.com/uploads/1/3/0/7/130739385/bexuku_pumakivura_tufuj_bikulir.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/1/0430/3106/8823/files/jefaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7405/9424/files/17835345001.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/sirir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/17839780950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/tigopaputado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0235/4070/files/sample_covariance_calculator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/fodewisavawibukadalitaxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8463/4530/files/gosukifef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1605/1096/files/jimani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/72256374931.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0521/3852/files/sebevurejomuwaxukas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6556/3541/files/74245402126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/1180150267.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_off00006569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6569 5476 bytes
SHA-256: a04116139aa8fcef16373364195e22e6d1ac4ae3d422c2a3c78fb7f341451c7c
font_01_sfnt_off000077eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77EB 10260 bytes
SHA-256: b1a723067686920e0f32e960b1aae23331441626a77956bbb5263d47fe792082

Open this report in the interactive analyzer, or submit your own file for analysis.