Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2bd51d38580f411…

MALICIOUS

PDF

42.3 KB Created: 2020-08-14 21:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 80e2134f21c049052391857d9518bbe8 SHA-1: 00dfc227204ffe208d71c907b92d88c6c73f82ee SHA-256: a2bd51d38580f4113e75724866519d17b4f91fd4af97a70439d67ead780fcab0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to a URL that masquerades as a Java download. This URL is embedded within the document body, suggesting a social engineering tactic to trick users into downloading further content. The presence of a PDF link farm further indicates an attempt to distribute content through multiple, potentially deceptive, links.

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=java+for+windows+10+x64 In PDF document text
    • http://vidumitiz.syrinxmusicalinstruments.com/uploads/1/3/0/7/130738629/gipasukojijiw.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/1/0433/9440/0414/files/runupewegam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2471/7723/files/levuroro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1656/0550/files/pejopu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8228/4194/files/anger_management_course_workbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4976/3487/files/59801132745.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3883/3816/files/vopudek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6869/3407/files/18414499959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9091/2159/files/11862532767.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3278/8648/files/67451747019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8162/1919/files/45720087959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4727/2098/files/31513729042.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 1

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_off0000617a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617A 5516 bytes
SHA-256: dea14b21e6415e3ad37747e498353e9d77300a5442080d43b1a5eb837560903a
font_01_sfnt_off00007461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7461 12748 bytes
SHA-256: aa6205c5f4101b964fd1dc2bbe0c9ad24085572690e519e96f7f70e79de5b421

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