Malicious PDF — malware analysis report

Static analysis result for SHA-256 427592593d64ba2e…

MALICIOUS

PDF

37.5 KB Created: 2020-08-21 16:21:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d90ffe0e4f96a036ae21214f0d0e7fa6 SHA-1: 0f7f4d011fa450dfdd5261d9298d75275f6fafe5 SHA-256: 427592593d64ba2e46b2de2871eec3c24d61e0d6f809f926fb8194f0c05b69b2
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a redirector at 'ttraff.cc'. The document body, though heavily obfuscated, contains the same redirector URL and a URL pointing to a PDF hosted on Shopify. This suggests a phishing or scam attempt where the user is tricked into clicking the link, leading them to a malicious site. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=online+piano+sheet+music+generator In PDF document text
    • http://files.milkearlyparentingsupport.com/uploads/1/3/0/7/130776253/4337250.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/1/0433/7205/2643/files/tokafimodujoduvubeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3468/1250/files/it_infrastructure_project_manager_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7555/7793/files/wufasomejoziviri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4732/9698/files/final_commissioning_report_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8253/0472/files/rotosivirasakifajejibi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2115/3957/files/4831897939.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/genipurodekiwofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3421/4561/files/vumozug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4709/9290/files/cds_ota_syllabus_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0918/5688/files/18796973284.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: chicagoland4x5.org 4 samples

Related samples 4

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_off000052a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52A0 5372 bytes
SHA-256: d236e844d451728a5503ce52bea1b25dd9dd771d6792db739d14053275e38e8d
font_01_sfnt_off000064b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B7 10792 bytes
SHA-256: d77aab43b1ae15c843f9b7f49bd61e1d729bc42d6413b3c9d3c0952b0e3aa9be

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