Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc6acf3b3d6ed126…

MALICIOUS

PDF

42.2 KB Created: 2020-08-05 03:00:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3d07f023e780810e24f58ecccfc74f3d SHA-1: b7f32eda3836f4f02a51d0aef085bfd316535573 SHA-256: fc6acf3b3d6ed126de84b73bc92a8f196b0691d9504d647b65563f4a20c21306
194 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a primary redirector URL pointing to a "phylum nematoda characteristics pdf" keyword. This redirector leads to a link farm of numerous PDF files, suggesting an attempt to manipulate search engine results or to phish users by presenting them with seemingly legitimate documents. The ML classifier strongly indicated maliciousness, and the presence of redirector links confirms a malicious intent to direct users to potentially harmful 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=phylum+nematoda+characteristics+pdf In PDF document text
    • http://files.outsideincounseling.org/uploads/1/3/0/7/130775677/mejajukimikesesu.pdfIn PDF document text
    • http://files.warrensimonsphotos.com/uploads/1/3/1/4/131407530/kijedorageripok.pdfIn PDF document text
    • http://tisex.cocobeautystudio.com/uploads/1/3/0/8/130814423/xudofad-divavumikipow-sadaxafafap.pdfIn PDF document text
    • http://files.amirzaheri.com/uploads/1/3/1/3/131380158/8657236.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/1/0433/8630/6710/files/tinikufuduxixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/2175/7590/files/qasida_burda_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fulefevizurosojasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9670/2104/files/57890859199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9623/6447/files/14220057156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3249/4751/files/jazupatixun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9936/3222/files/bozifim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0790/7752/files/osrs_pure_guide_2017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7539/5993/files/vufuvujegubajexakoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3351/8489/files/computer_lab_posters.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 2

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_off00006767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6767 5496 bytes
SHA-256: 18f766383271ea5ad966cc18bb10c0b41c624ee58051e72e0b4e8cea6ba9fa99
font_01_sfnt_off000079f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79F7 10028 bytes
SHA-256: f75c1a34ec5721d73cc92465a572ac5bed9d0ebb9113a1cc6235725a99e5c79c

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