Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aac5c0843ac60b0…

MALICIOUS

PDF

41.2 KB Created: 2020-08-17 01:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4769d2f0b4a37d6dd69eeffc9a729072 SHA-1: 66b9b42554b505c64974bc5c9cc7b7096d157f1d SHA-256: 4aac5c0843ac60b07d6a44d9157af1e9ee7c60f380aad3bb910b180794e08c91
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF file exhibits malicious behavior through a large number of embedded external links, a technique often used for SEO link farms or to direct users to malicious sites. One of these links, 'https://ttraff.cc/pify?keyword=yaml+formatter+for+vscode', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF files hosted on Shopify, suggesting a coordinated effort to distribute potentially harmful content. The presence of a malicious redirector is a strong indicator of malicious intent.

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=yaml+formatter+for+vscode In PDF document text
    • http://dufemigir.mcculleycuppan.com/uploads/1/3/0/7/130776855/surebajufewipurikit.pdfIn PDF document text
    • http://files.wynnenoblepotteryclass.com/uploads/1/3/0/7/130739570/bokutosizage.pdfIn PDF document text
    • http://xewuban.zonialucero.com/uploads/1/3/2/8/132814930/banevij.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/1/0433/8669/9925/files/18753391088.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1330/7541/files/onnuri_auricular_therapy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5294/9913/files/zefilawijarisetavefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7272/4900/files/catholic_wedding_program_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/math_grade_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7304/4642/files/22207385409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4574/6838/files/fefikisexefinekaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/22625887157.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 8

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_off00005820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5820 5188 bytes
SHA-256: 1a9af36ddc6b9ce2a1bb31a6099b4d8a8be72abb39d40ae5e968179e37d7de42
font_01_sfnt_off000069ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69AC 2092 bytes
SHA-256: 6e5de5c6bcb7fdd8c5ca0d25823a8f80e6c764803c1b732dbc9c425a5c0f8ea5
font_02_sfnt_off00007352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7352 10668 bytes
SHA-256: 314ab9e7523c2aa4cbe8bcbdda43e0c875de2989e87cda7673bc7ccbf99c36e7

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