Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bdbec75cf43c42f…

MALICIOUS

PDF

72.6 KB Created: 2020-08-08 02:31:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2cca1dc83c1e27e1afa625fb0d7015ff SHA-1: 3397e1f8371ec983ab11a0df91b1093c55a901d1 SHA-256: 7bdbec75cf43c42fe9c6fb91ae37d84cb1980e50b33a380a158dcb94233f4c9d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external resources, many of which are hosted on domains associated with SEO link farms and redirectors. The primary redirector URL, 'https://ttraff.ru/pify?keyword=livro+argumenta%25C3%25A7%25C3%25A3o+pdf', is flagged as malicious. This indicates a likely attempt to direct users to malicious content or phishing sites under the guise of a document download. No scripts were extracted, but the structure and link farm suggest a malicious intent to drive traffic.

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=livro+argumenta%25C3%25A7%25C3%25A3o+pdf In PDF document text
    • http://vuworo.rufcreativefashion.net/uploads/1/3/2/6/132681352/fivuwum-fagubew-puxoworoz.pdfIn PDF document text
    • http://files.raynalong.com/uploads/1/3/1/3/131384281/sibafozafu_ruxapak.pdfIn PDF document text
    • http://files.whispergathering.com/uploads/1/3/1/8/131856039/9311032.pdfIn PDF document text
    • http://files.twoforestplaza-leasing.com/uploads/1/3/0/8/130874680/tikozanefogabon_jemit_jabelumolu_nuvukijadini.pdfIn PDF document text
    • http://files.thefilamentstudio.com/uploads/1/3/1/6/131606035/fakesijerisaz.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/1/0435/9625/1304/files/58057916443.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5213/0716/files/28573375167.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/naxarasorinu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0409/9735/files/pdf_file_download_for_windows_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9323/7665/files/ditarupapomuvenemuguro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9588/2918/files/glittering_generalities_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2897/0647/files/aithihyamala_part_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87960197539.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5384/1560/files/classic_wow_pet_attack_macro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/novorubafiwani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/wowojumurasunusagavefoten.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1219/3438/files/detaxorazaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7064/4631/files/58193266465.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA29 5652 bytes
SHA-256: 026c9d874b1632215f782da2451f99393c327e7595ef49c231160d1facb5d374
font_01_sfnt_off0000eccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCD 12892 bytes
SHA-256: 9bbe3b22b7bcdd0c463ccf0d99755db524f4c1aca2d76dd3c9e844c43261ef8e