Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fb7bd118b101da1…

MALICIOUS

PDF

37.7 KB Created: 2020-10-15 07:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 89fe7a3f9f0796e47e8bb43f2968e832 SHA-1: 718123a13198ca4f47462aa6919edc0eff8d8ba8 SHA-256: 6fb7bd118b101da1ff993202025602871dd30d591cbc8d49ed2ec7686fd8e04e
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/123?keyword=westinghouse+tv+manual+50+inch In PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/3718456.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/acc2bcd1.pdfIn PDF document text
    • https://site-1039148.mozfiles.com/files/1039148/16440039574.pdfIn PDF document text
    • https://site-1039814.mozfiles.com/files/1039814/rowaxaboxaloxeku.pdfIn PDF document text
    • https://site-1039570.mozfiles.com/files/1039570/likafarisexivejel.pdfIn PDF document text
    • https://site-1039229.mozfiles.com/files/1039229/30048942841.pdfIn PDF document text
    • https://site-1043853.mozfiles.com/files/1043853/61875877033.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/8be40785-5d3f-409b-ab09-390bbb21bcbd/73544943540.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d58b2c59-5d31-420f-83d9-e5c45cbaad03/32751946317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3282cf1e-fe8a-47c7-859b-338b000116d6/todefipomazuzekerujusifog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23abfbb7-c122-425c-a846-f53a0964df5d/3551264889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8938/5890/files/nudusovudu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1187/3189/files/stoichiometry_calculator_grams_to_grams.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8081/9894/files/21491544214.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5719/3895/files/99245760273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9548/2261/files/the_course_ed_miller_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6daeae40-6e1f-4fe9-9540-268438406d11/nefibigosekum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f4d7884-0c4f-4e7d-8a9e-a6d0beb1c670/vifidavizasofonir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe81e53d-4b04-4f44-a72d-9be6cd850af3/26456568938.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d11c353-779b-48d8-8a65-e5c047f8ec84/delitowajusotufigobop.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_off0000537a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x537A 5456 bytes
SHA-256: a200fc0985ad0cb0254a55d217c1109d3d75e0055492c8d0046429be9f02fd98
font_01_sfnt_off000065f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F4 10380 bytes
SHA-256: ecadcf43a8593d5c94672f993be045bb39ec7dea360e428c8896373664cc8db0

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