Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaf2b54464955dba…

MALICIOUS

PDF

43.4 KB Created: 2020-09-12 00:40:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: d71f348786e76918a468dcf0aa8dc326 SHA-1: 5a9866444887c721da1c208033e8c30f8a8fc781 SHA-256: eaf2b54464955dba1f87c64dd10c1deebda5a895b5f1ecf99717eab0d5da4d1e
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.link/pify?keyword=web+browser+video+player+android In PDF document text
    • http://files.amazon-dark.com/uploads/1/3/1/4/131483830/finerumosileti.pdfIn PDF document text
    • http://kufulego.indivisiblesanjose.org/uploads/1/3/2/8/132814930/5dcb22.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7584/5792/files/45041292449.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0545/1174/files/popigefix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xugufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8996/9820/files/sexamolivakedugejuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5945/3845/files/home_folder_mac.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4733ca_428ed438ef7e43d0991b2051229bba10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3665/5259/files/bird_stewart_lightfoot_transport_phenomena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sitadekekogog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6067/4198/files/sumikitigosefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5094/3135/files/degedokavesij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7202/8823/files/sijedikowobi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFB 5068 bytes
SHA-256: 17f17197489f0f48dc803859cdde0cb3a1cd692394528807e437fc1d1b349971
font_01_sfnt_off00006f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4F 10280 bytes
SHA-256: 2b2bf63f30d7a98e0b9e6adf7204ace9bb186f05413a3871a302825653d24515
font_02_sfnt_off00009294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9294 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2