Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5d65a001e6b6b5f…

MALICIOUS

PDF

45.8 KB Created: 2020-08-17 06:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3940944746e38377a41414c33176a08b SHA-1: b884accd505c10f3861d8657fb17029a4a754d1c SHA-256: f5d65a001e6b6b5f58eceeee25396679166071cf8f10797ad8f8ea539e1f51e3
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, characteristic of a link farm designed to improve search engine rankings. One of these links, https://ttraff.com/pify?keyword=2013+acc%252F+aha+cholesterol+guidelines+pdf, points to a known malicious redirector, indicating a potential phishing or malware distribution attempt. The ML classifier strongly supports the malicious nature of this document.

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.com/pify?keyword=2013+acc%252F+aha+cholesterol+guidelines+pdf In PDF document text
    • http://files.support.famhealth.com/uploads/1/3/1/4/131437740/3357936.pdfIn PDF document text
    • http://nepeda.tasteoforovalley.org/uploads/1/3/1/6/131636881/ec9b508d.pdfIn PDF document text
    • http://files.appimn.org/uploads/1/3/0/7/130740013/4235893.pdfIn PDF document text
    • http://files.friendsofcherryorchardpark.org/uploads/1/3/2/3/132303219/6006201.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/1/0428/7243/8947/files/hoja_de_seguridad_del_acido_acetico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7258/5888/files/48611323761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8689/5522/files/ragutemituxovusamilemusan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57355052908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0593/4757/files/xamesenamoxefifunadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9596/4328/files/ladavofagevigan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/3250/5502/files/loriza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/katusuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7712/4764/files/290102981.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2513/6792/files/wajodamudazepu.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 8

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_off000072ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72ED 5848 bytes
SHA-256: b272c9fe463e6ba057c5ef3b76de8810c513502a7a0a5223286811f93549d14a
font_01_sfnt_off000086c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86C5 10304 bytes
SHA-256: 09b4149dcc0ffa4a9be23ff4763acfc64778ed3c841bf47a00bb7cd7305015fc

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