Malicious PDF — malware analysis report

Static analysis result for SHA-256 91a437955c06ca46…

MALICIOUS

PDF

47.2 KB Created: 2020-10-25 08:47:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 29ef6f4e7300706c477ebcdae45c74f2 SHA-1: c24435aa2eab9b0501da3601b9a9ed9ddc549b0c SHA-256: 91a437955c06ca46dddcc326c4d07137588c687af4ae5a1b4c728f198365da68
194 Risk Score

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.link/aws?keyword=clinical+pharmacy+and+therapeutics+6e+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367645/normal_5f8880cf741dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367941/normal_5f8cb356d9d7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369926/normal_5f905af0bf96b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369323/normal_5f87ee8048ecc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f8dd0d456de9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b57cb8af-cccf-4628-b8b1-3f7c2dfb1d2e/15874422232.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fa945b0-05f5-4028-83da-5bb9e9d23bb7/49354680873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d71a40d-29b9-4866-8537-5655ce007e2c/50_shades_of_freed_movie_download_300mb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cad6a062-d95f-46fe-aebb-b5f2a2dbdfef/liriwezowuze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f938f011-a8fd-4dd1-900c-9e3220fc9cc2/66147972476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/779f0444-6141-40f6-976d-e7408cb9c006/32813284016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c64121b-b31f-45e0-821d-08ed8ef6261e/vanisupifivevowesu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ab6b8bf-8cdb-472e-b328-6f0af0f04c33/tevitejifoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91be4ca7-2c8e-403e-9a93-db769923986a/wosuvewolabelaximejusi.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/lubetora.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/asme_b31_3_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/curriculum_vitae_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2486/2365/files/register_of_deeds_hamilton_county_tn.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2199/2599/files/vesazevepubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/1138/6787/files/pokokev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2124/0989/files/40902658769.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6035/3429/files/outer_space_game_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48fa707d-e114-49c6-a28b-45ba105721f7/65131827454.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6047d689-9561-4351-8119-0592b0b7d80e/marketing_strategic_plan_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3fcafde-ec7d-44e3-ace9-5e1fab4621ce/90032052282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d3e9ce7-decb-4574-832f-03d2a3b0893b/26031873760.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1108ca56-9f4e-4381-b6bf-525aa40b1264/simokiwoner.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_off000079b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79B4 5556 bytes
SHA-256: 22d195c9834bb7c109f1a677f3991359ba4819c2529df5c6ec1c22426dce1605
font_01_sfnt_off00008c77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C77 10132 bytes
SHA-256: cb4920039bd1b488cd7f006b956af6d8ee8bf92d38792e42ebdf5f1077289ef7