Malicious PDF — malware analysis report

Static analysis result for SHA-256 c428f7a321e57830…

MALICIOUS

PDF

40.9 KB Created: 2020-08-14 13:44:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6800cfa2d3acc60ef4403315e7242dc7 SHA-1: 33338ec92db4e27510e52050e5b49ca7836ff203 SHA-256: c428f7a321e5783043c5ce549f57415b95cc467769c2df8645385bfb731ff5b6
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though partially corrupted, suggests a lure related to 'Australian drinking water guidelines summary'. The primary heuristic indicates the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=australian+drinking+water+guidelines+summary'. This suggests the document is designed to lead users to malicious content through a link farm strategy.

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=australian+drinking+water+guidelines+summary In PDF document text
    • http://files.lucytherescuedog.org/uploads/1/3/1/4/131408502/21d1d72aec262.pdfIn PDF document text
    • http://files.firstaidcomicstaylor.com/uploads/1/3/1/1/131163858/387445367.pdfIn PDF document text
    • http://zujov.thecutesyndrome.com/uploads/1/3/1/4/131408100/5b078eb6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/zinenusunalax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2218/6656/files/kinds_of_adverbs_worksheets_for_grade_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3874/4476/files/wonezanifenufavori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2133/4690/files/67788341183.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/5842/4995/files/cable_gland_explosion_proof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0528/8349/files/32580246848.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8776/4387/files/regression_analysis_by_example_chatterjee.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8536/4390/files/35303037631.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/kagawepad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5981/3279/files/zinetax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/taxogiz.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 4

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000572a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x572A 5164 bytes
SHA-256: 8a767c5b838e62740a4b8ca7241918e957839dd437e470550217a60673fe39a9
font_01_sfnt_off000068a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68A7 9364 bytes
SHA-256: 31e2da95b2d61a865259ea86f9df48733b00be2a768a804ed7ada0411dcbd8c0
font_02_sfnt_off00008868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8868 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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