Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d790c86d4e27ac6…

MALICIOUS

PDF

63.2 KB Created: 2020-11-01 11:11:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: b5a0dd8c03cf2a96ef2a6f1f4ff07aa2 SHA-1: 9b30116e757a8549644430bf9279d8efeddf2a6c SHA-256: 2d790c86d4e27ac6e73ca12bf889a2dc38d86b6be09e0d4a3bd31dfbfa5cc729
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/pify?keyword=swtor+adaptive+armor+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379380/normal_5f9e2b6f06d6f.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_01_sfnt_off0000b697.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_01_sfnt_off0000b697.bin)
    • https://cdn.shopify.com/s/files/1/0506/9445/5450/files/note_value_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/medina_county_fairgrounds_hondo_tx.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/innova_3100_f_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1846/7518/files/zanotifesamedure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1868/8963/files/mini_machine_gun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4265/0277/files/domain_and_range_of_a_parabola_khan_academy.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/boruvebadefamixofekodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9282/6517/files/android_go_edition_download_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/datuxemuketewuladowejep.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/tesiwudesanebelavaditu.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_01_sfnt_off0000b697.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6730 25184 bytes
SHA-256: 4232a0a2f5b609621bf61b2a683081f358aa354b79e81909739f52d953ca6258
font_01_sfnt_off0000b697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB697 5324 bytes
SHA-256: a09a3d1795b492ac7982f6b2244869f978e3c642e03ee247b6126738c7db9d88
font_02_sfnt_off0000c8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8BB 10768 bytes
SHA-256: 5aec3843649c71cf948ec1a7c6fe1dda5508d3b5153f34740256ec0c0c526e79