Malicious PDF — malware analysis report

Static analysis result for SHA-256 38ac771527713aa8…

MALICIOUS

PDF

39.1 KB Created: 2020-10-17 11:39:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 151cb371d818b2babdecc784e335b215 SHA-1: e1816b2074de3780d0ad704eda6a4f96dd20846f SHA-256: 38ac771527713aa87b33b65d81e8400e53c947553a05248cf7b173ae4a10946a
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://gettraff.ru/123?keyword=world+supply+chain+finance+report+2020+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f874755ec7a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f87154b21442.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370087/normal_5f899b5543344.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/1245811.pdfIn PDF document text
    • https://fixabugodorev.weebly.com/uploads/1/3/1/8/131856934/tugamax_rezedaloki_dadefemel.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/kazesafazoti.pdfIn PDF document text
    • https://fevixivosetakub.weebly.com/uploads/1/3/2/6/132681861/zuvakudiverawugin.pdfIn PDF document text
    • https://zekuwatifakaxi.weebly.com/uploads/1/3/2/8/132815855/nagusifivugubop.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/c25f730.pdfIn PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/1012226.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/038885c85ecf8f0.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/1/0266/8317/9198/files/tulare_county_office_of_education_bookmarks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2240/1192/files/46141801310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3531/9702/files/dogfish_shark_dissection_quiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0752/7077/files/103066477.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/6747/8694/files/43464459458.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4954/5628/files/birds_short_story.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7418/3853/files/strike_force_kitty_last_stand_google_sites.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_off00005b25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B25 5632 bytes
SHA-256: e19ce3a5d509b273bb56566e200291ccb988e9f160b334168982eb16969bee93
font_01_sfnt_off00006e60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E60 9700 bytes
SHA-256: d3fd9215faffa449b25f53c5ba4cb36b716646b1928d3b1833bcfd468efd20df