Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe2e313f77eafe0…

MALICIOUS

PDF

40.9 KB Created: 2020-10-27 20:51:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: c6e9bb989feaf37df174c13362ec29fe SHA-1: 651c23dca2fbcdf0f09bf42f8c47b1700775148d SHA-256: ffe2e313f77eafe0de509ad76a2c63ae97bab5ef3f91a0d6ae2b09da5e9bb306
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=conant+high+school+rating In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383917/normal_5f93ef08e393a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393499/normal_5f9273901eb5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387412/normal_5f8ef4ca656d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384820/normal_5f914bbebb327.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006145.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006145.bin)
    • https://cdn.shopify.com/s/files/1/0491/9135/4534/files/anatomia_cuerpo_calloso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9510/6750/files/sebawiwadetuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/2209/3983/files/radiation_detection_and_measurement_knoll_4th_edition_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1651/8805/files/measurement_guide_for_cooking.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3167/0179/files/human_needs_and_wants.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/adobe_reader_download_windows_7_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/hunter_valley_map.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/tivogag.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/64603301484.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/koweverulorelexawa.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/effect_of_human_activities_on_environment.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/rigaluvafabum.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/biodata_template_for_marriage.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/gebewot.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/kefuxolesevujejobus.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 extracted file (font_00_sfnt_off00006145.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6145 4968 bytes
SHA-256: 4c1c50a1b63dbf5f63ae34eeb50bd838aaa40bf06732bbcfe79f11ec9f9adfaa
font_01_sfnt_off00007221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7221 10536 bytes
SHA-256: b9564ebbc5228ceec2c4cb73780a97f77fc13c1e42d7cf8198a66fb3183a481f