Malicious PDF — malware analysis report

Static analysis result for SHA-256 79146c15d985aafc…

MALICIOUS

PDF

43.5 KB Created: 2020-10-15 05:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4924fc6c5190ef6f1333d873c33cc331 SHA-1: f57ca8e527616e00d445a7f18b49435fe8a68f83 SHA-256: 79146c15d985aafc91e146f6620be45947c2c9cb8f1b244b24e3245a8415189a
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which are designed to appear as legitimate PDF files hosted on Shopify. However, one of the primary links redirects to a known malicious domain, ggraff.ru, indicating a phishing or redirection attempt. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ggtraff.ru/123?keyword=spell+check+gmail+android In PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/zebitajoze_lamadamu.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/xewuj.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/1/0500/9915/9211/files/guillermo_odonnell_democracia_delegativa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/gijabesok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1472/3990/files/wcti_weather_radar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9903/7089/files/george_to_the_rescue_episodes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3282/8824/files/arabalar_5_kurua.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5327/1208/files/boat_autopilot_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0601/1809/files/binidokuxinilete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6680/9241/files/sweetwater_school_district_2_bus_barn.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7400/2837/files/criticism_and_the_growth_of_knowledge_lakatos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4202/9215/files/roxuwopiwadoxot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5699/6245/files/zikitonof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7481/6674/files/minecraft_plants_mod_1.15.2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/2399/9391/files/himalayan_monal_pheasant_female.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbcadd4d-81c6-4188-b1b6-d7a2b10bb60b/nevekudiruxejev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2d3244c-97fa-48a7-9d35-fc359eb248a3/90006584833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a42b26cd-46d5-49af-9986-0d7b595af41c/zobilibakizefun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7140/8801/files/drumstick_display_case_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1354/4863/files/transistor_de_efeito_de_campo_fet.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_off00006aac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAC 5476 bytes
SHA-256: 682f3c5929ca2ee1b3db63cd09737cb9dadc0dc10bed9d7189fbc8c0c40393a0
font_01_sfnt_off00007d23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D23 10676 bytes
SHA-256: 4c79e26044fa229f7d9315aaa9589f2ea32f79a509307ca73c7e780434d55ba0

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