Malicious PDF — malware analysis report

Static analysis result for SHA-256 e913aa53d15314c2…

MALICIOUS

PDF

61.3 KB Created: 2020-10-27 23:55:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: e0db70750a65c313122ce1384c5809f8 SHA-1: 010b78698144aeb575d347c431a2d2413d2146e1 SHA-256: e913aa53d15314c2b2737e1d259a9379d6fcc371c7bf64fbc5532032353871d7
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.me/123?keyword=texas+dall+sheep+facts In PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/8dd33f12.pdfIn PDF document text
    • https://rofexigu.weebly.com/uploads/1/3/0/7/130738805/zakawosemut.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/jolol-bisijimerukuvu.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/1/0486/1660/3816/files/properties_of_matter_worksheet_8th_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0158/5562/files/ruzarutoniwuzojexevoli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5008/1183/files/final_fantasy_3_snes_rom_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6274/7545/files/3m_fluoride_varnish_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8e98611-75d6-4ba0-a65f-469d5407286a/logic_bobby_tarantino_zip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d9a217f-828e-43da-bad2-325f7de7b25f/27952284715.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdc5ef5b-701d-4a6c-90c8-f32bd26e9a75/pemepop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3af10ca9-58da-41e5-839e-b67f2fcdab14/xasivukatalazofenaluka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0495e396-3fbd-418b-aa61-324e093ec2a7/towuzezefeg.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/49303058090.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/characteristics_of_human_language.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8cf24d3-b667-4724-8aeb-c45b27fe4d52/wimax_bus_eumerator_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aee8451-321d-4939-ae7e-608dba9e613b/vivajabudevodufonuxub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c53822d8-2b51-46e4-b983-fb40292c9fac/78766630109.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7bff4a4-17f1-4c32-beae-c08595c49684/balancing_chemical_equations_worksheet_10-_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5630828-a570-4733-9298-d9499442cbd3/5170135132.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/044976b3-1d37-4540-81ff-7666e6ceec86/fuxapafi.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_off0000b303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB303 5164 bytes
SHA-256: 485164960fb9ef519c8c4e9fc57fc8f28654bd11f4268e1f7ae990fc88f65c7c
font_01_sfnt_off0000c492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC492 10460 bytes
SHA-256: fe0fed52186095953c53c3e732f8342f62d78e61f02fcd4297e560117277d195

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