Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dc3286b508887f2…

MALICIOUS

PDF

48.2 KB Created: 2020-08-21 04:30:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a144a3b62f14c31080560a6572957baa SHA-1: b96ec833074bcb3229dd8b9d167284ac6d75565e SHA-256: 1dc3286b508887f28ee58b1ae1800aa14e01306f7e6fb6eb7ec776398e346907
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=annotate+pdfs+in+evernote'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The ML classifier strongly supports the malicious nature of this PDF.

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=annotate+pdfs+in+evernote In PDF document text
    • http://desuwawu.xudedesigns.com/uploads/1/3/1/3/131381787/3a44b44180d21a6.pdfIn PDF document text
    • http://muvow.galaxydawn.com/uploads/1/3/1/3/131383949/manijuxipujop.pdfIn PDF document text
    • http://files.nancyribi.ch/uploads/1/3/1/3/131381003/580fa8255.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/1/0430/8199/0293/files/analyzing_architecture_simon_unwin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5765/1613/files/anfitrion_plauto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7857/4490/files/20535995253.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3368/8226/files/fuledemegerukun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6226/2936/files/bovad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7221/5448/files/30711242521.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1676/5087/files/android_listview_arrayadapter_viewholder.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5588/8022/files/lexozevinubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1935/2740/files/guia_de_adestramento_de_ces_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1479/9012/files/riper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0971/2021/files/lusitu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6865 5052 bytes
SHA-256: 329e155e2f2e3a06fdc2882c46cf561d962fd3fc07c947c796f316dfc30a0f69
font_01_sfnt_off000079a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79A9 10620 bytes
SHA-256: a69fba57721df570196d586087d1a766387a37260e46ba3f53bce21fbc85fc66
font_02_sfnt_off00009de3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DE3 16388 bytes
SHA-256: 2cadb2ae25cea88cb182acc54f62d1c218aef5f2772c4081b94d5d3cddde1204

Open this report in the interactive analyzer, or submit your own file for analysis.