Malicious PDF — malware analysis report

Static analysis result for SHA-256 913deb293b62c953…

MALICIOUS

PDF

45.2 KB Created: 2020-08-07 23:22:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9537396d8ddee3b1b215ada1acbed977 SHA-1: f90c33e187e4c3de73f896458dacf9e3ca4a3124 SHA-256: 913deb293b62c9530ae7b66bd55a882c1aa7c4b456fc1f0c1967aa07e7f07f69
194 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it contains links to known malicious redirector infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic fired, revealing a large number of embedded external links, many hosted on Shopify. The primary malicious URL identified is https://ttraff.ru/pify?keyword=vejiga+urinaria+anatomia+pdf. The document body contains garbled text and what appears to be metadata from wkhtmltopdf, suggesting it was programmatically generated to host these links.

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=vejiga+urinaria+anatomia+pdf In PDF document text
    • http://files.tearsofglass.ca/uploads/1/3/2/6/132682829/pudaxuromofav_gapawo.pdfIn PDF document text
    • http://files.body-knowledge.com/uploads/1/3/2/6/132681824/2094315.pdfIn PDF document text
    • http://files.myfutra.com/uploads/1/3/1/3/131384018/netax.pdfIn PDF document text
    • http://files.gracevillepilates.com/uploads/1/3/1/6/131636914/wusedimib.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/1/0437/8977/9106/files/88079624487.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/espn_ncaa_basketball_scoreboard.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9443/2161/files/romigoja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8100/7255/files/33448973184.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9861/2636/files/maxovugumapivirisovadeta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4203/8182/files/81906143448.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9650/6521/files/91071563902.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2862/7107/files/ciencia_y_tecnologia_angel_o_demonio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/36493712400.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/nobuto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7629/6614/files/suzuki_an_125hk_2013.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9523/5490/files/68779550645.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70FE 5192 bytes
SHA-256: b5cff56e50ef01cb2d70bf37e1e2eec1bc7290e2dc1f810081b71f2804173637
font_01_sfnt_off000082a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82A1 10888 bytes
SHA-256: fe9e99cf2c6dc396450e35fb82ff107114534cdd246b6e17129b23eb017ffe2c

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