Malicious PDF — malware analysis report

Static analysis result for SHA-256 1143d99fa4abc164…

MALICIOUS

PDF

60.5 KB Created: 2020-08-23 09:44:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9c80f34a2c5af20fa0a3cdee7ea63d21 SHA-1: 89a2bcf0ceea0e50a37cb0b1063d96d05967113e SHA-256: 1143d99fa4abc1640ea81dc455f790043a749def39fb94a9ee2fb868f5baaf36
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting an attempt to drive traffic to malicious infrastructure. The embedded URL points to 'ttraff.ru', a known malicious redirector. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or malware distribution lure.

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=ariane+501+failure+report In PDF document text
    • http://files.tuftslaw.net/uploads/1/3/2/6/132683000/5255025.pdfIn PDF document text
    • http://xerarejo.internationalschoolhealth.org/uploads/1/3/1/4/131453197/vogilozomowomik-liwanidosadedal-zemidowa.pdfIn PDF document text
    • http://files.alphabetspeechtherapy.co.uk/uploads/1/3/0/8/130873951/wagevonokun.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/1/0430/8641/3985/files/regex_empty_line.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86662201832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zavoriduxosijalas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/8809/0022/files/gejujawemumebenin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/lidimuto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1249/7312/files/bedford_reader_10th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/14240290093.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/2216/4639/files/80042548259.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8150/7740/files/paleronazezosozuvumikidu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8746/9469/files/kaporadijonala.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
🗂 Part of campaign: internationalschoolhealth.org 8 samples

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_off0000b1cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1CC 5024 bytes
SHA-256: 8a48d2426431ed53bf045a7a7b0774774b6462b75c4f6d011a93eb24b930d15c
font_01_sfnt_off0000c2f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F7 10076 bytes
SHA-256: 07faac86543eea3e0ad26b22f93b07baf8a17542bce3b23d25114db96fef5b7f

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