Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5be5c2fa1b29bc6…

MALICIOUS

PDF

38.6 KB Created: 2020-08-12 04:57:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8e1b137426824776b4703ca205161aa1 SHA-1: 081dcd194887a3db7ab1c8abd6b3e8dc225620a8 SHA-256: f5be5c2fa1b29bc683b18f8dd290c054984648148387014939b2bad3e51439c2
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO spam and phishing. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/wb?keyword=50%20tons%20de%20liberdade%20em%20pdf'. Another heuristic flagged the PDF as a link farm, with many links pointing to Shopify domains, likely to appear legitimate. The document body contains garbled text but includes the same suspicious URL, reinforcing the lure.

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/wb?keyword=50%20tons%20de%20liberdade%20em%20pdf In PDF document text
    • http://files.yogablog.co/uploads/1/3/1/4/131406966/9110701.pdfIn PDF document text
    • http://files.ciecanswers.com/uploads/1/3/1/4/131453810/viwit.pdfIn PDF document text
    • http://files.townhousecarpet.com/uploads/1/3/2/6/132683080/9273308.pdfIn PDF document text
    • http://zuses.saturnrinanewburnmedportfolio.com/uploads/1/3/1/1/131163651/8410004.pdfIn PDF document text
    • http://konas.africaspectrum.com/uploads/1/3/0/8/130873995/2340728.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/1/0427/6636/8935/files/diwok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1762/4990/files/topulamilobaneriji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9148/3041/files/44424532842.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3504/1702/files/14030981430.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3485/9941/files/50168762460.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/4780083199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/51750735362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9825/0141/files/nazidiledujiborisiver.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3146/8951/files/python_machine_learning_book_by_sebastian_raschka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1613/4551/files/pasodaduporafedibif.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 5

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_off00005794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5794 5500 bytes
SHA-256: 07afa67f9c3145a5c7f8306864e80802e13f6aaad3daf45ebc0eab4144e591d8
font_01_sfnt_off00006a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A22 10608 bytes
SHA-256: 4fe976c7dd8ab85e6fb055e1eaad210d35b372c8854df7b7f6e1a5b658536e4f

Open this report in the interactive analyzer, or submit your own file for analysis.