Malicious PDF — malware analysis report

Static analysis result for SHA-256 39f0d90166484c0d…

MALICIOUS

PDF

37.9 KB Created: 2020-08-19 12:25:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 730b031e373f0b5caf9fb319d9c03b0f SHA-1: 79c2b5dfb0e5339a8812f6558f0877d579b64472 SHA-256: 39f0d90166484c0dbd8b1106bbc60fbbf9dfd898d0b6703b642f0d2f6fd4256e
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with a critical heuristic firing indicating a malicious redirector link to 'ttraff.com'. Another critical heuristic identified a large PDF link farm, with many links pointing to Shopify domains. The presence of these links suggests an attempt to manipulate search engine results or to distribute further malicious content. No scripts were extracted, and the document body was heavily obfuscated.

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=punctuation+comma+exercises+pdf In PDF document text
    • http://files.fosube.com/uploads/1/3/0/7/130740573/fudunaw.pdfIn PDF document text
    • http://files.newlifenewbern.com/uploads/1/3/1/1/131163705/tafigevegozux-tasawoziw-xuwinugub-tafasow.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/1/0432/6139/5102/files/tuzodonaburozux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/lotuxiluluni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5802/0004/files/fishing_report_michigan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9082/8705/files/75934717382.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44758106853.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1130/9719/files/polasisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9073/8328/files/addison_wesley_science_10_textbook_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4794/2294/files/agatha_christie_and_then_there_were_none_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/kinimerugexanumi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/higher_mathematics_books_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9875/7538/files/latupenukotagotawuvujuzel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0413/9416/files/51693615967.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/3846/2372/files/minecraft_maps_1._7._10.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
🗂 Part of campaign: byrdhouseandladybugs.com 3 samples

Related samples 1

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_off000055b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55B5 5336 bytes
SHA-256: 81b8f8af40b2c08cc33575c2b3141bb5b487fccca82cb37c7468333f18089d73
font_01_sfnt_off000067be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67BE 10372 bytes
SHA-256: 44ae303ba7d52e27c8b2fdffd2cea606d86cb8bd493051be1420c551084bc463

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