Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd74fca192704431…

MALICIOUS

PDF

53.4 KB Created: 2020-08-19 07:14:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b98e9963d01452844e97fae248177c92 SHA-1: 7d28d7aac1185670f6ee567a75db54477eed8973 SHA-256: dd74fca1927044319f51704f7b2a5e30f73a871b3a621e764687789f672db3d2
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains the URL https://ttraff.ru/pify?keyword=flow+meter+installation+guide, which is likely intended to deceive the user into clicking it. The presence of numerous PDF links, many hosted on Shopify, suggests a tactic to obscure the malicious destination and leverage seemingly legitimate platforms for distribution.

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=flow+meter+installation+guide In PDF document text
    • http://files.chris-elliott.co.uk/uploads/1/3/0/7/130739871/fakekekovuro.pdfIn PDF document text
    • http://files.salasirian.eu/uploads/1/3/1/4/131454899/5687099.pdfIn PDF document text
    • http://favesiwud.gracemankato.com/uploads/1/3/1/3/131383363/0c200c83917.pdfIn PDF document text
    • http://furadogab.corinnemanning.com/uploads/1/3/0/7/130739017/7a9714cf.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/1/0429/5262/2236/files/66139401461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3108/4708/files/apostila_auditor_fiscal_receita_federal_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4054/6714/files/wufumituvolupaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8726/3899/files/dizemaxowevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/pw_atkins_physical_chemistry_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2354/9094/files/xosegek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8360/3863/files/7569425204.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3220/4696/files/gepuvezonox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1304/4386/files/github_pages_subdirectory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8935/4142/files/kejipevatajatejujewodit.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 3

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_off00009442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9442 5192 bytes
SHA-256: 399ffd3796bbbfed1c193f9c6449fc676cb57728fabb715b2a8f71312dda0463
font_01_sfnt_off0000a5e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5E1 10220 bytes
SHA-256: 47a8f393998fb636600a731f1f6a64eb78c0ec5cb661cfc208a555d2d03a5663

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