Malicious PDF — malware analysis report

Static analysis result for SHA-256 f247a019e5f64925…

MALICIOUS

PDF

41.7 KB Created: 2020-08-20 07:47:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 138376d0bdb8809564f5ad22a0f668ab SHA-1: 867684e15cf4126182c403c73e32120ce8e3304c SHA-256: f247a019e5f64925efe86926e58aed5bfc862ecddf956f5dcf0c9a0f0634bf13
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at https://ttraff.ru/pify?keyword=o%2527+reilly+python+free. Another critical heuristic identified a large number of external PDF links, suggesting a link farm designed to manipulate search engine results. The ML classifier strongly supports the malicious nature of this PDF. The document body, though heavily obfuscated, contains the malicious URL and other URLs pointing to PDF files hosted on Shopify and other domains, likely as part of a lure to disguise the 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.ru/pify?keyword=o%2527+reilly+python+free In PDF document text
    • http://files.jazzphilosophyfusion.com/uploads/1/3/1/3/131382583/norujuj_tuwemolezipaf_ridevezovoteje.pdfIn PDF document text
    • http://files.perfectlittleme.com/uploads/1/3/1/6/131607093/foborerukoxi.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/1/0431/5647/1970/files/vevugilowamofemeluroderif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9354/7424/files/anatomy_for_sculptors.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3462/4668/files/angular_6_template_form_validation_on_submit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/5330/1150/files/zojepagidoxojexodofi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2937/2821/files/84670613723.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/chemistry_textbook_high_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/tokijakozasidiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9912/0033/files/pazasubaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8778/2297/files/beyond_the_lights_soundtrack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2453/1101/files/carpenters_close_to_you_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0271/4536/files/kuletozolivotazez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8361/2831/files/tugavezo.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_off0000681d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x681D 4764 bytes
SHA-256: 3995a9f5312777fbb3dbe8e31c7241a9238f6db13864262018eac9a02de093c9
font_01_sfnt_off00007856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7856 10092 bytes
SHA-256: 39b4c815653d173505458558ec5ecf9e97baa076510866fff9b770ad7413f385

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