Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c6368c2fc4e398c…

MALICIOUS

PDF

43.2 KB Created: 2020-08-17 11:09:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2f3af4b832a80854287506617e760bd1 SHA-1: 749e11ada4f1db100c802cc8729254141451e2c2 SHA-256: 4c6368c2fc4e398c2e38d2210e9f5bae7d9c76811f12995b187da07759e0d0a3
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous external links, many of which point to Shopify domains. The primary malicious URL identified is https://ttraff.cc/pify?keyword=bureaucratic+leadership+advantages+and+disadvantages+pdf, which is likely used to obscure the final destination and potentially evade detection.

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=bureaucratic+leadership+advantages+and+disadvantages+pdf In PDF document text
    • http://files.summithilltopperfootball.com/uploads/1/3/1/4/131406736/9a3d8f4c0faf1.pdfIn PDF document text
    • http://files.laxmiindiangrocerystore.com.au/uploads/1/3/0/8/130874222/fififofijugujakiwi.pdfIn PDF document text
    • http://files.antioch-jubilee.net/uploads/1/3/1/6/131606368/nukofuvi_rawedazaf_pewewomipi.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/1/0433/9977/4364/files/quimica_fisica_peter_atkins.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/8327973374.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1627/2547/files/14555456379.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1721/4874/files/17356249455.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7364/2389/files/definition_de_l_argumentation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9650/6521/files/the_weeknd_twenty_eight_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6518/0321/files/gorozibufik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8993/5002/files/amd_radeon_hd_7700_series.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6359/7466/files/91822770894.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2251/4338/files/51966942858.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8477/5577/files/kajeg.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 6

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_off00006896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6896 5524 bytes
SHA-256: 2e7dbebcaec819508b21840cfb2f36ef1ff41fb8b62a882ad545c8e9c2b986dd
font_01_sfnt_off00007b63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B63 10668 bytes
SHA-256: 342c887a66c8eca4086f2825f3c289312dfda736d2b7237d58013717fa63c0fb

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