Malicious PDF — malware analysis report

Static analysis result for SHA-256 1551e8f4c93c63f7…

MALICIOUS

PDF

47.9 KB Created: 2020-08-21 10:05:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 65599891f3dba970289fc06e6e1f1d35 SHA-1: c84bbacecc830bbfe896e16948c7e4b0a339cb36 SHA-256: 1551e8f4c93c63f79bcfc64a1ac6ae221c41c8ff7d47239cf08a33e5c6e773d5
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to an SEO redirector farm, designed to lure users into downloading potentially malicious files. The primary redirector URL is identified as malicious. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to deliver a payload or phish for information, likely via a macro or exploit.

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/pify?keyword=uc+browser+fast++apk+latest+version In PDF document text
    • http://files.nlistudiosla.com/uploads/1/3/1/4/131438038/pabutarirotosara.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/1/0434/9113/1554/files/phn_mm_chuyn_sang_jpg_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5642/1269/files/chief_keef_bussin_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0708/1622/files/space_engineers_thruster_calculator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3254/2369/files/mudejoxovedewisekomujekuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8443/9971/files/87795191363.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/87221866370.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5881/5398/files/82261980497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/vb._net_file_from_onedrive.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_off00006232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6232 5356 bytes
SHA-256: a28402f46b4f976113f1719e90e7b6241e8a7460a75bec208d951a13a983de50
font_01_sfnt_off00007492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7492 14844 bytes
SHA-256: 3d0d339ad4c86835187242891d89567c133ef7c934d9044ed5e4a545fddc58e3
font_02_sfnt_off00009e1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E1D 16092 bytes
SHA-256: c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e

Open this report in the interactive analyzer, or submit your own file for analysis.