Malicious PDF — malware analysis report

Static analysis result for SHA-256 1241c5e957603525…

MALICIOUS

PDF

41.7 KB Created: 2020-08-15 14:42:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2f2ac73503a35f4af666338b9917521f SHA-1: 3f755347a0c5968938521e3d709750b829257d4e SHA-256: 1241c5e95760352554ed5008882b16f8547e20034c95a68dabc1265d5c433064
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous links, many of which point to redirector infrastructure like 'ttraff.ru'. The primary link 'https://ttraff.ru/pify?keyword=sensors+actuators+and+their+interfaces+pdf' appears to be part of an SEO link farm designed to lure users with seemingly legitimate document titles. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple external links suggests an attempt to drive traffic to potentially harmful sites, likely for phishing or malware 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=sensors+actuators+and+their+interfaces+pdf In PDF document text
    • http://wikoxew.deannabaldi.com/uploads/1/3/0/8/130813055/ziwikimanumeg_lokotederediw.pdfIn PDF document text
    • http://files.glenroypreschoolcentre.com/uploads/1/3/1/8/131856917/4000c5b56.pdfIn PDF document text
    • http://files.kingrobinsonibmagnetschool.org/uploads/1/3/0/8/130874063/letumiraxarizusu.pdfIn PDF document text
    • http://files.deniserodgersbooks.com/uploads/1/3/1/3/131398100/tixutubaluzo.pdfIn PDF document text
    • http://files.photographybycarrie.co.uk/uploads/1/3/1/6/131636651/7477664.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/1/0435/1062/8511/files/10798408162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2230/2888/files/44889365812.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9113/1557/files/pivalonamitapiwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9550/6592/files/21087434616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2953/6676/files/widasuzozutimedote.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7335/3381/files/wajijovuwixekazutotujevof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13578549785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0389/4171/files/nukusegexipase.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_off00005eb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB0 5316 bytes
SHA-256: 464ea6f646cb9e3378b2cb524021c4b440a4757731a23587e5d98d1d47cc1f5c
font_01_sfnt_off000070b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70B3 12960 bytes
SHA-256: 4568d5c2655d5436e7587674d8c98e94dd20352a02f4cde15005d3b70056dd0a

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