Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ce39bc507d19c1b…

MALICIOUS

PDF

59.6 KB Created: 2020-08-31 20:59:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fd39850bd687a32cd2e16bd340a172b7 SHA-1: 8fb2595459c7a127315fa6d3efe1888f0d455e3d SHA-256: 8ce39bc507d19c1b5ace3e4135cde9ef56970135a265389bfa0210fea849452a
194 Risk Score

Malware Insights

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

The PDF file contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text fragments and URLs related to 'apk borderlight oppo neo 7', suggesting a lure for users interested in mobile applications. The presence of a malicious redirector indicates an attempt to lead the user to a site hosting further malicious content or phishing pages. The ML classifier strongly flagged this PDF as malicious.

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.link/pify?keyword=apk+borderlight+oppo+neo+7 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/1/0435/1534/7103/files/15387334856.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8657/5771/files/big_data_in_healthcare_research_papers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bararilisubolubudikolumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9291/5864/files/grade_8_afro_asian_literature.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6958/8124/files/alkane_alkene_alkyne.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1355/1781/files/zovixexa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0272/4506/files/albino_rhoa_feather.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zisavugeti.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/19103d_8771f90c20684342bb5ab6339b945009.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f4de5e_ee00ed8073104b2f9c61bff37966963a.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE9 6676 bytes
SHA-256: 63b56845cf9a0b63bd1e0c615a76e231494e07ce049a896d11879254b756f20f
font_01_sfnt_off00008ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC0 5104 bytes
SHA-256: 6b47ee274ecea2eeab7405ba726e98253ae2f86a7573fb6a801a944fdae393ba
font_02_sfnt_off0000a01b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA01B 13644 bytes
SHA-256: 3cbcf7fbda39a528211a534792ac05967885a6d10c2c395371ce86e33dbd3bc5
font_03_sfnt_off0000cbd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD2 16208 bytes
SHA-256: b9ce2a69d7062e6ce176d2423fef49bcd955ad056a009dbf8258de8b57a023eb

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