Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9191c0ec17b1882…

MALICIOUS

PDF

45.1 KB Created: 2020-08-06 21:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9c9f7802903df84177321039cffd8c20 SHA-1: fc729d9da94317ab4742e00cec4736ee13300ea6 SHA-256: b9191c0ec17b1882a7e90b6daeed539419531d351010d9df9b9aa5a296e34288
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the malicious URL and other Shopify-hosted PDFs. This suggests a link farm or SEO poisoning attack designed to redirect 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.ru/pify?keyword=geographical+information+system+nptel+pdf In PDF document text
    • http://files.titanguitars.com/uploads/1/3/1/6/131606874/5755983.pdfIn PDF document text
    • http://gasezapi.equineofficesolutions.com/uploads/1/3/1/4/131452903/nogefab.pdfIn PDF document text
    • http://files.lostarkwoodworks.com/uploads/1/3/0/7/130776887/bonagat.pdfIn PDF document text
    • http://files.jamiemuffett.com/uploads/1/3/2/6/132683484/rifikitif.pdfIn PDF document text
    • http://files.rmarredondo.com/uploads/1/3/1/3/131380741/dunivogoxelo_wutaloboriruwes_baxatuvofezu_repobavasen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5603/7017/files/39189458315.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/88557725508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/57608638913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4684/6119/files/72370475784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0831/9907/files/178981732.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9164/8929/files/10237046996.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8994/2945/files/retinopatia_hipertensiva_fisiopatologia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9307/2808/files/python3_socket_eth_p_all.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8538/9206/files/python_language_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/fapitinesa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0731/7912/files/application_letter_sample_for_fresh_graduate_accounting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4987/6630/files/bourne_supremacy_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2566/1095/files/wirokoworimuvupewixumu.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: chefdavidbmorrison.com 6 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000623e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623E 5492 bytes
SHA-256: c3fb55b0fa5effb4602902eb69de153921608c44b6013081cca46bab3ae92963
font_01_sfnt_off000074c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74C5 10600 bytes
SHA-256: 7df07c8b6858e7c7826b38d969b4618f282817a2ad8873913c3d6511d06e7769
font_02_sfnt_off000098f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98F7 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71