Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fdee09a83b3f325…

MALICIOUS

PDF

78.0 KB Created: 2020-08-15 02:59:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cc7478b30561b802f0dc1015464fb19f SHA-1: f12d9384ac15881b41bf21a14bc61f769ef20690 SHA-256: 3fdee09a83b3f32509e220276953493369008d649b82dc12d5015fd731487377
194 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, disguised with a seemingly relevant keyword. The document body, though heavily obfuscated, contains the same URL. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the ultimate destination and potentially host malicious content. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=fisiopatologia+do+cancer+de+mama+pdf In PDF document text
    • http://files.chinapivotsource.com/uploads/1/3/1/0/131071043/9f9e81.pdfIn PDF document text
    • http://files.mud-lusciouspotterybymichelle.com/uploads/1/3/0/7/130775916/dbfb1.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/1/0433/3115/8175/files/college_physics_a_strategic_approach_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9635/9580/files/pamiroxowutikokegupov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6670/4550/files/kizamapegefade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7806/5059/files/32967713656.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/free_templates_wordpress_for_photographers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/webomobituwisumepepaxifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7529/6670/files/52014347355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8917749958.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/1836/7654/files/epigenetic_modification.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9165/6864/files/application_programming_interface_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/jipovevikaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2222/8376/files/29384688472.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 4

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_off0000f485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF485 5432 bytes
SHA-256: 0796031583f6f4d86f2015335f96a2fa1c5091b77a8c8bc2ab86b6b8f1a59391
font_01_sfnt_off000106e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E6 10540 bytes
SHA-256: 75c3890b3f824d5ee69594831a81aebf36fa5012eddcfed28e4ae918ec361bba

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