Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f2a78f45b890ef5…

MALICIOUS

PDF

42.4 KB Created: 2020-08-13 17:36:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f9a2a03402d9d2c389c349e4619a02c4 SHA-1: 708c79d5e22a5cb4882536e1f7466d55745954da SHA-256: 9f2a78f45b890ef5ab941b239302a552853c76ca632a317d97a3299b7eaf4f83
194 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains numerous embedded links. One of these links, https://ttraff.cc/wb?keyword=brainwashed%20by%20tom%20burrell%20pdf, points to known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains this URL and a large list of other URLs, many hosted on Shopify, suggesting a link farm or redirection scheme designed to lead users to malicious content.

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/wb?keyword=brainwashed%20by%20tom%20burrell%20pdf In PDF document text
    • http://files.rabbithoppingsocietyofaustralia.com/uploads/1/3/0/8/130813757/9ff8cd0a.pdfIn PDF document text
    • http://files.dekaping.nl/uploads/1/3/2/6/132696274/8961248.pdfIn PDF document text
    • http://files.acuddleabovepc.com/uploads/1/3/0/8/130814636/3347191.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/1/0431/4916/4698/files/19675158411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6442/5634/files/36085657758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3139/5478/files/66080571280.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9118/9157/files/87704500199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5355/5610/files/ecology_and_environment_by_p_d_sharma_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2903/7219/files/38461916846.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/jurik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27247465441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5197/3799/files/eicosanoids_pharmacology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0455/7688/0293/files/basic_grammar_in_use_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6268/8918/files/buriviko.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_off0000602e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x602E 5664 bytes
SHA-256: f5ad1762220ff526bca177641ddfc4b6823e74edd02f56f7c16736fcd3450cdf
font_01_sfnt_off00007357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7357 11792 bytes
SHA-256: e5b9e0954469ec6c886ec2756ba8e8886f3fc7ea08de4e41fd938e3d0298237f

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