Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcff494fee384608…

MALICIOUS

PDF

39.0 KB Created: 2020-10-11 16:56:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 56b90e598a9e33cef37f70029b7e07b2 SHA-1: 80758f29d0d6e223c04511a866d2bad55eeb3f64 SHA-256: bcff494fee384608ae560428223beb10c430ca26f781395c02b8444020c0da35
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/pify?keyword=manual+for+amazon+fire+tv In PDF document text
    • http://files.rennyabello.com/uploads/1/3/2/6/132696580/49eee7af34cdf.pdfIn PDF document text
    • http://files.dna-audio.com/uploads/1/3/2/7/132740485/dabiwik-fofigebuboxurek-nimogenafumozu.pdfIn PDF document text
    • http://files.artandsoulmakeup.com/uploads/1/3/0/7/130739996/binamavinekuzuk.pdfIn PDF document text
    • http://lopow.bednbones.net/uploads/1/3/1/3/131398027/4902366.pdfIn PDF document text
    • http://nononajo.assetviewcapital.com/uploads/1/3/1/3/131381886/4db2d254c.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/1/0428/5369/5647/files/44779700909.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7894/2360/files/tertiary_economic_activity.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0963/7533/files/morugipavekod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0371/5489/files/how_many_valence_electrons_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8258/0130/files/81782688108.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1453/5843/files/systems_of_equations_and_inequalities_word_problems_worksheet.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_off00005af0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AF0 4848 bytes
SHA-256: a52fa378010afc5575923e64ef06a7443fe833ea236724b237d6b7b99ed02fa5
font_01_sfnt_off00006b6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6B 10580 bytes
SHA-256: 0523c0a9d1158dc8669525f15b7bc93cf1f669a24891839b16002cc526e26189