Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b186e13d13ee4b4…

MALICIOUS

PDF

39.3 KB Created: 2020-08-14 13:41:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b8db05a1650c5c270f18bd29b8719eb7 SHA-1: d537e74e369942adc39f32dfda99d8ab921ee67d SHA-256: 5b186e13d13ee4b41f99b7ea79c969a89691307b6432c93242f88749af513391
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains the same malicious URL, suggesting a phishing or scam attempt to redirect users to potentially harmful content. The ML classifier also strongly indicated maliciousness.

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=european+union+powerpoint+template In PDF document text
    • http://files.dragonflycoulee.com/uploads/1/3/2/3/132302855/3056133.pdfIn PDF document text
    • http://files.sahardsattarzadeh.com/uploads/1/3/1/4/131407179/1692686.pdfIn PDF document text
    • http://sotijo.shakracentre.com/uploads/1/3/1/6/131606875/8586498.pdfIn PDF document text
    • http://tunidom.softutor.com/uploads/1/3/1/0/131071164/fofeso_vezexer_pomem_xorawijata.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/1/0433/9784/1054/files/post_gallbladder_surgery_diet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2925/8649/files/pelawanudatujefitazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8455/4141/files/biology_syllabus_class_11.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3057/6295/files/starting_out_with_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5646/3014/files/animals_maroon_5_piano_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1673/2320/files/32697627275.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1963/1765/files/79271238595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5543/8234/files/75954821192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7731/1395/files/application_of_buffer_solution_in_pharmacy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0673/6037/files/99259776009.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 2

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_off00005e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E84 4836 bytes
SHA-256: fb32266ff23412306d483ebf07966496d3935ee0077d00515408fe6e321057f6
font_01_sfnt_off00006ef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF4 9796 bytes
SHA-256: e19f51e7d9a14c25b4c3764925ab23ed8954af21e393e1ac632ca874aa7a1beb

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