Malicious PDF — malware analysis report

Static analysis result for SHA-256 4188b6a86a4a4804…

MALICIOUS

PDF

47.4 KB Created: 2020-08-22 18:38:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3c9a05c01d959f5104d2b1a8aaffb20b SHA-1: 56fe76f7941521b229e13a5a3cd4c75b57424b3a SHA-256: 4188b6a86a4a4804b12de1b6bd913a13a72f06f8a24bfda58ee36425ca85ad69
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.001 PowerShell

The PDF contains a link farm and a lure to install browser extensions, directing users to malicious infrastructure. The primary malicious URL is ttraff.ru, which is flagged as a redirector. The document body contains obfuscated text and URLs, including a link to ttraff.ru and another unknown PDF hosted on amandatsam.net.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=chrome+extensions++all+files In PDF document text
    • http://files.amandatsam.net/uploads/1/3/0/8/130874012/zemaxarufedov-xirenafinutup-turozu.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/1/0435/8635/5357/files/realistic_water_two_sse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4061/8134/files/audio_amplifier_circuit_diagram_with_layout.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8043/3302/files/award_template_ppt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6109/2250/files/42288080603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3412/2139/files/5856433199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/28424835933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0709/0581/files/nupeginagupememopefojukil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0840/0280/files/24803944085.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5869/1237/files/kulun.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_off00007c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C50 4980 bytes
SHA-256: 4c75459b1232bac60c713cba6d4827c57e8a5bbe9e0e091375bcd78444703b0b
font_01_sfnt_off00008d18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D18 10712 bytes
SHA-256: 44a0fce4e6d542474d23c18a074ac0e6862409ce2f2418755a995c8490db7f8d

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