Malicious PDF — malware analysis report

Static analysis result for SHA-256 27439d13fde54f07…

MALICIOUS

PDF

42.7 KB Created: 2020-08-11 21:40:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 501643f25d968b0857b81ad278d02cab SHA-1: fbae1563aaf6977820e29fd00cd58f11927442d7 SHA-256: 27439d13fde54f07f43db5025940a910da9893310b7a4c7566c0529e3daa77c8
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 identified a link to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'vacunas en mujeres embarazadas pdf' and the URL 'https://ttraff.ru/wb?keyword=vacunas%20en%20mujeres%20embarazadas%20pdf', suggesting a lure to a malicious site disguised as a document download. The presence of numerous Shopify links, some marked as benign, indicates an attempt to blend malicious links with legitimate ones.

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/wb?keyword=vacunas%20en%20mujeres%20embarazadas%20pdf In PDF document text
    • http://pilufin.holistichealthactivation.com/uploads/1/3/1/3/131398140/wenijojobif.pdfIn PDF document text
    • http://files.katelynnmills.com/uploads/1/3/1/3/131398145/mefur-gidexalav.pdfIn PDF document text
    • http://files.spartan-drywall.com/uploads/1/3/0/8/130874050/tewodifimutavavize.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/1/0431/9844/7778/files/download_teks_asmaul_husna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8789/6482/files/kotinikojulafot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4504/3880/files/vanes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3761/3461/files/nuxuvowoxewemitadosix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8614/1847/files/scerts_assessment_forms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9994/7169/files/81384549637.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7193/8453/files/gone_gone_the_form_of_man.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0506/7943/files/l_amnagement_du_territoire_ivoirien.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9241/0525/files/wegisatilujired.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6703/8109/files/roblox_troll_gui_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0382/7608/files/36129430558.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9282/0643/files/dabh_written_update.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
🗂 Part of campaign: spartan-drywall.com 6 samples

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_off00006766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6766 5500 bytes
SHA-256: 134efc4430cb3d26ec125ed8b700c853810c5754fc4f62074833100c1d15a196
font_01_sfnt_off00007a0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0C 10572 bytes
SHA-256: 772dfd68bd03f6ac0803ffd2432962dcd316bcaa2763b8415bcb178529319457

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