Malicious PDF — malware analysis report

Static analysis result for SHA-256 52915b74a00325a8…

MALICIOUS

PDF

81.8 KB Created: 2020-09-06 03:31:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 65e94a2aafcf23843b05b55a7bb8f579 SHA-1: 93799360a3602c1f9f40e02deebc3a7df89f1c46 SHA-256: 52915b74a00325a8bfe912d8fecfdc40ce5bffe8ba667908f8d14c0a94d88e01
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector. The embedded document body text, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=define+chloroform+in+french', which is flagged as malicious. This suggests the document's primary purpose is to redirect users to malicious content.

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=define+chloroform+in+french 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/1/0435/0948/1624/files/employee_performance_evaluation_template_excel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6803/8047/files/dragon_s_crown_pro_platinum_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7955/5486/files/ruzab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6773/6225/files/active_n_passive_voice_rules.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c3f59f_c3a05afbfe2d40dab8e4aae9113e1258.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c70c35_f6f44eabdd0b4398a30c3875f812b5e8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_6f4427a72ee54ff1ae66f07e83c5cc71.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bb13a2_e195daabd365459fb04115eb622915ec.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e23fbb_9e5e7e0308b246eaa6c05403b1fdf05f.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3067/4597/files/vibujeviweveliwapapazevaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4903/3640/files/gilobu.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d902bb_6152b99b5de448168b392ef71c1fc192.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7ef0dc_fbda0f0ac08d46a5beac08a03026272b.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

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_off0000e7eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EB 6492 bytes
SHA-256: cf6bcbaf462759e04676f8989e7e87ed4d43c4317550ddbd0c5684ab0bd17b73
font_01_sfnt_off0000f81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81F 4732 bytes
SHA-256: c11d7a62161aacf883887444103e921f273e7a54dc22f19dc892c0357ce73c76
font_02_sfnt_off00010815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10815 16056 bytes
SHA-256: 080a4c51e9d89cc484595aef5e2a4a4e4b59e5f72bbff11d0a66c0048080a88d

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