Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8e6f194bc65d75f…

MALICIOUS

PDF

57.6 KB Created: 2020-08-10 09:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1d145e7e1b1a903f3f58a3d885566ba0 SHA-1: eaf17fa6122b5e470263bafaebf2c23c17021f50 SHA-256: f8e6f194bc65d75ff9474f53410e54be43b36d97917f0bda47454b9e09e52a24
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious Link

The PDF file was flagged by a machine learning classifier and contains a mass external PDF link farm, with many links pointing to Shopify domains and a redirector. The primary malicious URL is https://ttraff.cc/pify?keyword=estudio+exploratorio+descriptivo+pdf, which is identified as a known malicious redirector. The document body contains garbled text but also includes the same URLs, suggesting an attempt to disguise the malicious links or manipulate SEO. The presence of numerous links indicates a likely SEO poisoning or redirection attack.

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=estudio+exploratorio+descriptivo+pdf In PDF document text
    • http://files.shrineforus.com/uploads/1/3/0/7/130739809/lokenagagewoket.pdfIn PDF document text
    • http://files.kbassormt.ca/uploads/1/3/1/3/131381480/madosaside.pdfIn PDF document text
    • http://zivad.rahimafrooz-ips.com/uploads/1/3/0/8/130814328/rikesamavim.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/1/0433/9941/3925/files/eccentrically_loaded_bolted_connections_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/appositive_phrase_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/7275182805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/92603964065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8926/4794/files/jarowe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81159011373.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5291/5098/files/cub_cadet_2185.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6532/7262/files/ny_driver_s_license_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/28765563699.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/9697/7051/files/alphabetical_list_of_us_states.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_off00009fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FC0 5236 bytes
SHA-256: 6b7993578ad30abba84c0d8f33e06f1076399e7907cfc92230e1df6f3417352f
font_01_sfnt_off0000b1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1A8 11880 bytes
SHA-256: c7aaa5f1b7b7fa5bf5607bb5b2b20f748f813a1be9af4ca20d648564fc5f0258

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