Malicious PDF — malware analysis report

Static analysis result for SHA-256 63aa71c5ccb7ca20…

MALICIOUS

PDF

38.5 KB Created: 2020-08-21 22:59:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a02c353b4d910ef1681f3a9487105274 SHA-1: bbbc59d646bc86b60595c0728d92cce26dd979b0 SHA-256: 63aa71c5ccb7ca206909c2d72b3c213acb25aaea38f6c3821b0d3261e264afb4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics, suggesting a lure to a malicious site. The ML classifier strongly indicates 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.cc/pify?keyword=black+blue+background In PDF document text
    • http://gekebarur.handymanservicesanchorage.com/uploads/1/3/1/1/131164250/fabagemamirusameg.pdfIn PDF document text
    • http://files.mahaffeylibrary.com/uploads/1/3/0/7/130775232/80d9b4405e4db76.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/1/0433/0687/7080/files/budexojimomamuzarumedi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6661/2130/files/wopoxurakokafedegisejosan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3889/0394/files/yahoo_massenger_download_for_mobile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5345/7320/files/7306544302.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6735/6824/files/vodewixo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5865/8456/files/38247388294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8197/3416/files/46044381234.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6441/6661/files/pixorakazazinawol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1755/8426/files/articulos_cientificos_de_biologia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7909/6728/files/42379741635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/7848/6933/files/19844340479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5904/3749/files/tasugititefajasemijenefi.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_off0000461c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x461C 5184 bytes
SHA-256: f28413e00438ad9c904cc6f9daf6df1b617129d391893a5d1539d1c19e1b952e
font_01_sfnt_off000057c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57C3 9388 bytes
SHA-256: f480c2ec0948e4e6999c61eeeec3496967d19cbc51026360cf535dc0b7c5c9e7
font_02_sfnt_off000077f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77F4 16164 bytes
SHA-256: 0646a63a478fe53468b8dbbe05b608d617a04836cde27f490c8d0ce00ae8a9f2

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