Malicious PDF — malware analysis report

Static analysis result for SHA-256 21eab06765308093…

MALICIOUS

PDF

45.7 KB Created: 2020-08-07 15:57:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 40f1d86ff4de4fad4fcd880c290c5292 SHA-1: 44f9472774190c9c27fbec5429f5f163bb441596 SHA-256: 21eab067653080933e1ea21ce2ddbf9859254c9cd9be776760aac6517f251b8b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one critical heuristic identifying it as a malicious redirector. The primary malicious URL, https://ttraff.ru/pify?keyword=comportamiento+de+los+agentes+economicos+pdf, is designed to lure users to potentially harmful content. The document body, though partially corrupted, contains text related to economic agents and the wkhtmltopdf application, suggesting a lure document. The presence of numerous external PDF links further supports the link farm heuristic.

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=comportamiento+de+los+agentes+economicos+pdf In PDF document text
    • http://kobopu.jaymarksdmd.com/uploads/1/3/2/3/132302872/levotuguzoletijumi.pdfIn PDF document text
    • http://files.swlar.com/uploads/1/3/1/6/131637014/xoponepede-dinemekoxi-bewasiletu-lemidebarefuwud.pdfIn PDF document text
    • http://files.dtmsportsonline.com/uploads/1/3/0/7/130738524/1483256.pdfIn PDF document text
    • http://files.mthermonministries.org/uploads/1/3/1/4/131406412/a6d5425e1c93.pdfIn PDF document text
    • http://files.donread.net/uploads/1/3/1/3/131378915/5776639.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/1/0430/9309/8660/files/80455343583.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3398/4162/files/rinamakabojebajemafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1702/3138/files/programa_arquitectonico_de_una_vivienda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7400/0798/files/91348272492.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files/79264087560.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4003/8302/files/83916446867.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0020/9309/files/55319639247.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1485/6610/files/24011716229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4652/6361/files/ronubebezekilejivabaxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6202/5624/files/how_full_is_your_bucket.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1570/8573/files/luwexigunuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/ruxibefolomapanexejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/2917/2122/files/cellcept_package_insert.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7305 5380 bytes
SHA-256: 0382ac1063c1f2f84c63cec2874248cfc36f7c7764147d0aeddc13e5c45325bb
font_01_sfnt_off00008539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8539 10604 bytes
SHA-256: f09cec7a3fa789f5f423416d62eb00153db55e2e47e15413faa6fecbfb586760