Malicious PDF — malware analysis report

Static analysis result for SHA-256 d824c9ef9cb4e2d7…

MALICIOUS

PDF

53.8 KB Created: 2020-08-12 17:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 333cd5400f9db15d14f8217fb4720632 SHA-1: 75352b4a00d484b9d5a7e70510273fbded2f85a8 SHA-256: d824c9ef9cb4e2d7a6fd5a2a764178ddd9006216ce7a0c644ae26b202cf75a6d
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a free biodata download. The ML classifier strongly indicated maliciousness, and the document body, though corrupted, contains text related to 'biodata pdf free download' and the malicious URL. The primary attack vector appears to be luring users to a malicious site via a deceptive link.

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=biodata+pdf+free+download In PDF document text
    • http://tawude.sanmholisticcottage.com/uploads/1/3/2/3/132303338/gigutafawu.pdfIn PDF document text
    • http://files.johnjfrederick.com/uploads/1/3/0/7/130740249/sawug.pdfIn PDF document text
    • http://files.mistoyo.com/uploads/1/3/0/7/130775934/3634499.pdfIn PDF document text
    • http://files.wereherenonprofit.net/uploads/1/3/2/7/132740930/1783848.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/1/0448/3717/5456/files/aneurisma_de_aorta_abdominal_clasificacion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/9644829643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8150/7740/files/xurotalilogevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0858/1019/files/blank_alphabet_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6957/8147/files/perimeter_of_a_polygon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/watch_men_in_black_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8827/1773/files/mojimemisuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8656/0936/files/ansi_b16_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9321/2827/files/24473512304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7862/2111/files/cessna_172n_pilot_operating_handbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7301/0845/files/sesatus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4031/8375/files/puwomitimejuwi.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_off000094c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94C6 4996 bytes
SHA-256: 23b0fad1278076b219cc48138bbb89b06fec316c1d0bf28c43e5fb4cf2186028
font_01_sfnt_off0000a5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5EA 10732 bytes
SHA-256: 50eca5ff81a44e023269c010cd2bf447f146d8cdfce118d913a0f2187c5814a4

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