Malicious PDF — malware analysis report

Static analysis result for SHA-256 708ce88f0f26ac96…

MALICIOUS

PDF

45.8 KB Created: 2020-10-04 02:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: baf67dfae7d727cdca7f703decf4a9a4 SHA-1: 31e1aa99cb9c22d90d09cd4ea65097b6814d5434 SHA-256: 708ce88f0f26ac96c7036b866dee9fc3e319e02f28a41787b5a1fc5e3733da6a
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.ru/pify?keyword=adventure+time+lady+rainicorn+of+the+crystal+dimension In PDF document text
    • http://files.writing4content.com/uploads/1/3/1/6/131637021/52d6162.pdfIn PDF document text
    • http://files.jacquelyncarterdesigns.com/uploads/1/3/1/6/131636644/59afc90dea2bd7.pdfIn PDF document text
    • http://sorase.jmontanaphotography.com/uploads/1/3/0/7/130738697/vugele-dejuzoro-zevopuna.pdfIn PDF document text
    • http://files.lilianmoses.com/uploads/1/3/0/8/130873826/3880312.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/1/0428/9226/3583/files/poxitinavuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0079/3760/files/1997_chris_craft_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7999/8881/files/braided_leather_eyeglass_cords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0533/0083/files/68544311836.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0060/2525/files/lubosikutataralev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5883/2294/files/olympic_view_water.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5747/8809/files/92052029728.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/3965/7631/files/wagivufuja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/8414/8643/files/kititomepoxenas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2298/1032/files/85374082391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0469/3105/0651/files/venture_deals_4th_edition.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_off00007594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7594 5412 bytes
SHA-256: ff5a2ba218244f704fb9dbf5126e8d6f9fc4fb4138a2fec78604fadd1309fd2f
font_01_sfnt_off000087de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87DE 9844 bytes
SHA-256: 3c7558a8fbd20f0d5e1f22f8b5e147f6acb36c3ce53329226ecff4a4d9dc6f7e

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