Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfed2c811b7f4c67…

MALICIOUS

PDF

38.8 KB Created: 2020-10-03 11:43:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 71fa4d39c6b446d960da1a5ebcb29620 SHA-1: 4e2486aea3c0477ba1c910b5b71616e3e04ce5b3 SHA-256: cfed2c811b7f4c672a1c7bcef6c01dcc582a60026d11808f0db62b1ed2cdcf32
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://cctraff.ru/strik?keyword=something+just+like+this+lyrics+coldplay In PDF document text
    • http://files.theyeyechampionshipleagues.com/uploads/1/3/0/7/130738700/kurakuka_ruwurulawu_viratuwuxir.pdfIn PDF document text
    • http://files.calgaryburnsclub.com/uploads/1/3/1/4/131452838/pemakirodixaluxunu.pdfIn PDF document text
    • http://files.savedbypainting.com/uploads/1/3/0/7/130775156/1469891.pdfIn PDF document text
    • http://fivugugu.angelaherbert-hodges.com/uploads/1/3/2/7/132740763/1775cf58f.pdfIn PDF document text
    • http://jesolu.ccscatu.org/uploads/1/3/2/7/132741593/mozawanijetazas_degusop.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/1/0462/7480/5922/files/campione_episode_2_english_dub_dailymotion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7124/9311/files/potejuzalirim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3070/6333/files/jubapeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7414/5441/files/mrs_claus_dress_girl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1605/1109/files/photo_on_resume_or_cover_letter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/windermere_walla_walla_listings.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2359/7725/files/65137466622.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4253/5574/files/minecraft_city_house_ideas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1843/9837/files/alpha_omega_easter_egg_walkthrough.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8070/4405/files/fidulumureba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9961/1555/files/pokemon_comic_book_download.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_off000054d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54D4 5832 bytes
SHA-256: c8a4bbba4fa91a722078d69c5fbe506cbd4ab1357959571b795e524b614a7831
font_01_sfnt_off00006895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6895 11836 bytes
SHA-256: 4bcfd7620c8388737b421d88aa3e9c0596eaa59080475a0cd268dcf73712b22a

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