Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b7850cc3c7d9a8c…

MALICIOUS

PDF

39.9 KB Created: 2020-08-27 18:14:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: db7eee5e3f43d100bc5e0f66b133d913 SHA-1: 3d4e0b49a8b2b730aab11bff8d5540ee2852b2be SHA-256: 2b7850cc3c7d9a8c841c0072c97180c476471d5c35da72278b15fa7094e74fb6
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF link farm. One of these links points to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but also includes the URL for the malicious redirector, suggesting an attempt to lure 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.cc/pify?keyword=neurological+music+therapy In PDF document text
    • http://wusavo.livinginnobility.com/uploads/1/3/0/7/130739922/43d239e7d2.pdfIn PDF document text
    • http://files.massagebyaxil.com/uploads/1/3/1/3/131383456/0ccd6bf934cda5b.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/1/0437/0599/1322/files/bg2ee_mods_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7573/1616/files/68500276200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/rapinurulatogadunofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2827/4585/files/32209079392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/4743/2871/files/99968071580.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1856/5278/files/11240419386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5278/5055/files/wupidavujinoki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2370/3969/files/mibadixikepox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4471/6199/files/dasezud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0101/1614/files/65929808338.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 3

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_off00005f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3B 5420 bytes
SHA-256: c8c8e11f27ce37e042bc5dc6bdbfca5ae655b14d83c3a359dd2b4ec4590b9e8e
font_01_sfnt_off00007198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7198 9688 bytes
SHA-256: 2d5338eb4db05032fdf6c33837d25c80850fde6d83284c60b8204d95e101bdc0

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