Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eb4c5847cb43726…

MALICIOUS

PDF

123.6 KB Created: 2020-08-10 02:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b1ca95951cca36b5758b0311a72e1da7 SHA-1: 9214433c2d94d9c965771001c6edb1114e6f1591 SHA-256: 3eb4c5847cb437262ac7544477eee7de4b76668890e77073c0266dcd4f599bcd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a practice PDF, aiming to lure users to a malicious site. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate the document's intent to redirect users to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=bangla+alphabet+writing+practice+pdf In PDF document text
    • http://files.ikargb.co.uk/uploads/1/3/1/4/131453598/70ff451e3d49ba.pdfIn PDF document text
    • http://files.bobdyerspeaks.com/uploads/1/3/2/6/132695543/4575605.pdfIn PDF document text
    • http://files.conklinbarracudas.net/uploads/1/3/0/8/130874110/budulerusuwuvi.pdfIn PDF document text
    • http://files.wowpartyrentals.org/uploads/1/3/1/8/131871740/3925202.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6944/6046/files/50269431333.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8073/6150/files/9040609191.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1720/7971/files/vonoruzefidelaxilazolefad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0011/0999/files/65710947757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70339383958.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/totepowubavujubiwirob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5443/2410/files/17950694120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/60307698963.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4068/3685/files/nefun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8588/9689/files/82466450859.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4351/1702/files/4782373432.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1969/7308/files/34779528269.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7881/9735/files/73968558322.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11279 5520 bytes
SHA-256: a3dfbaf3e77a99abaa9d91e99cc89dd9a5b92638bef7003f5ca3494d56df63bd
font_01_sfnt_off00012547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12547 60128 bytes
SHA-256: 347d8acc95d8bb0e7387c1a10ccf500d8fc44697640fb1a1b01721b9faf94985
font_02_sfnt_off0001a416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A416 17300 bytes
SHA-256: 8696cac4056b150195038d6b8504d467798537110583ab826694d1c835e657c6
font_03_sfnt_off0001d6c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D6C2 2280 bytes
SHA-256: d534fbb1df5870f4714ac0c8dcb51fa987e585ff217de7be8564674757bd014c

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