Malicious PDF — malware analysis report

Static analysis result for SHA-256 8543eb4790fc8cc6…

MALICIOUS

PDF

42.8 KB Created: 2020-08-04 17:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ee9fcba0d31e3911b0ce931e66dbf5af SHA-1: 65e5e898e833716ec3024900e730ab740621e646 SHA-256: 8543eb4790fc8cc6161b38c1b20b483582f200ba9cb83f33a158059de06e414c
194 Risk Score

Malware Insights

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

The PDF document contains multiple embedded links, including one pointing to a known malicious redirector at `https://ttraff.ru/pify?keyword=best+core+java+interview+questions+and+answers+pdf`. This redirector is likely used to obscure the final destination, which could be a phishing page or a malware download. The presence of a link farm and the ML classifier's high confidence score further indicate malicious intent. No scripts were extracted, but the document's structure and embedded links strongly suggest it's part of a phishing or malware distribution campaign.

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=best+core+java+interview+questions+and+answers+pdf In PDF document text
    • http://files.thecorydonexplorer.com/uploads/1/3/2/6/132682471/98083cf54.pdfIn PDF document text
    • http://files.neilbushby.com/uploads/1/3/1/3/131379099/3392620.pdfIn PDF document text
    • http://zaluv.dreamasweetdream.com/uploads/1/3/2/6/132696194/1923594.pdfIn PDF document text
    • http://files.sunventuretours.com/uploads/1/3/1/4/131407135/b46cc.pdfIn PDF document text
    • http://files.wildflowerwomen.net/uploads/1/3/0/9/130969080/likok.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/1/0433/0687/7080/files/xiwisabimetabif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1887/7090/files/jigofoxuzef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5100/7638/files/sisitelezapunusod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7571/2664/files/bixotepejaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9560/3862/files/ligne_11_aix_en_bus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45927795399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/15723539658.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7670/4664/files/kapesizizepagaduwexari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6963/5746/files/58652944998.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_off00006868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6868 5520 bytes
SHA-256: 318fb0e125385d23d72f119122c5a857ee106553e386023964963e2eaae3a9c8
font_01_sfnt_off00007b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B59 10124 bytes
SHA-256: 3b3136b2d76fa30d416a27fda9b5ab05521e7af293258bb1e1378da2bfba7aea

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