Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9566082c72248b0…

MALICIOUS

PDF

41.3 KB Created: 2020-08-15 02:37:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4fbeff6b8fffb8d160a549f7cfc37322 SHA-1: 90838289c2057e6a08caa7bb31f26ce5304618af SHA-256: b9566082c72248b0711aa5b9d611d4ae89fd42f4bb21103871e76071c741451f
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body is heavily obfuscated but contains the same malicious URL and numerous other links to PDFs hosted on Shopify. This suggests a link farm or redirection strategy to distribute malicious content or manipulate search engine results. No scripts were extracted from this sample.

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.ru/pify?keyword=bolton+school+sixth+form+twitter In PDF document text
    • http://files.southofnorthbeer.com/uploads/1/3/1/4/131408103/5539903.pdfIn PDF document text
    • http://files.lionessprayer.com/uploads/1/3/2/7/132710765/f5c0bedaa.pdfIn PDF document text
    • http://files.cupcake-couture.net/uploads/1/3/0/7/130775679/236e92.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/1/0436/3314/8062/files/fuwokubewezuvuxija.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7217/4745/files/67029287449.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8547/7541/files/mekolugotefawevidifimono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3350/8512/files/29067263206.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3335/4659/files/rental_deposit_refund_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4603/3818/files/online_editor_with_ocr.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/html_strike_through.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4886/9789/files/27724672265.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5503/6054/files/esc_angina_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6746/4085/files/john_shelby_spong_books.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 8

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_off0000637f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x637F 5120 bytes
SHA-256: 123e0759b70b14b25635a95bf178398c605e3da3ae714d2e96c7fe18af77b717
font_01_sfnt_off000074d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74D5 10556 bytes
SHA-256: aad8b6df243dc20dc1a58f449b05df5d358390afb064fbf3bcc52f31211819e6

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