Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9ac1134e8c2ee2b…

MALICIOUS

PDF

67.9 KB Created: 2020-08-29 09:11:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e606f4c15e923c276e99701b99d33fc8 SHA-1: 8101307ee94b0af2a313fa3051e710700aba92af SHA-256: a9ac1134e8c2ee2b3988cae483640a66665ccaf19a9d85f92f538ca23f284e38
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=pregnancy+and+postpartum+thyroid+management+guidelines'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on 'cdn.shopify.com'. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing the lure.

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/wix?keyword=pregnancy+and+postpartum+thyroid+management+guidelines In 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/1/0428/8764/3302/files/rogifedusukenewof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4802/4741/files/resuvedowasefusujesevivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8060/6111/files/33499255806.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/2060406594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4349/5841/files/60025545889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0604/2013/files/nenokigilomezerikar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1509/3920/files/nuzivuzulerunilinepu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3993/2064/files/teruweno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9511/3374/files/electronics_books_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38684703775.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_176043b66a5943edb306487a38132a78.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_ee97749bb1d04e2f90c42d5872c6ea91.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_077be8bd44074cc59e5e93c322d316e4.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 2

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_off0000b617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB617 5588 bytes
SHA-256: b1d94ffeac3d6994072d76a5b09c340dedb426c981f0451ef35863b2f9419d20
font_01_sfnt_off0000c8e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E1 10296 bytes
SHA-256: b990a81f4d2e0264a33dab586ef3d62131b70ffe76679208a1c8dace5ead78f9
font_02_sfnt_off0000ec3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3F 16272 bytes
SHA-256: 8596d51a523124fcb1950bb0b7033b1d9054ead7d937a3136e05175fcc3fb7d3

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