Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a91b6551cd85e52…

MALICIOUS

PDF

38.0 KB Created: 2020-08-11 21:18:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2eb163ff4003d216c83ff20b7351c29c SHA-1: b286f8a4a92f65ca911e4c2d13c1e8b0aac4dbe5 SHA-256: 3a91b6551cd85e5239996fbd6ec9565fe5996c5477fc7f9a76157b9016b539f2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=speco+asphalt+mixing+plant+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious sites. The ML classifier strongly indicated maliciousness.

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=speco+asphalt+mixing+plant+pdf In PDF document text
    • http://vikitug.pdsummit.ca/uploads/1/3/1/4/131438641/9788163.pdfIn PDF document text
    • http://kotabi.scholarlabresearch.com/uploads/1/3/1/4/131437736/vivak-nozozi-pegeditaj.pdfIn PDF document text
    • http://files.tngsblog.org/uploads/1/3/1/3/131382841/2601872.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/1/0433/9413/8277/files/driven_k_bromberg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/1671194969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4445/2005/files/kubebatadozubabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8005/5974/files/42012724430.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9593/9488/files/remove_identifying_information_from.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2742/3654/files/mekuzejerivovudoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6528/6564/files/36935530075.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3579/4327/files/nepemimukagod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/vujedozugofipala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3029/9292/files/91053631144.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6117/8521/files/remove_commas_from_string_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/free_newsletter_templates.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_off0000568a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x568A 5644 bytes
SHA-256: e50f2bf90497d386e9103720c598570425800871a257e941033bd69b9aa5c59d
font_01_sfnt_off00006998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6998 9796 bytes
SHA-256: 89e98c724fb63e17fc16e0ef8a404a825c064bca9dd2016cc9cc0bfeebd4dbbe

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