Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4a2ba47d962d3a3…

MALICIOUS

PDF

41.9 KB Created: 2020-11-02 21:36:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 657cbbb0eca459b243d6dcbe70703961 SHA-1: ca8ce7eca601c916877a5b832b6f35d66ceb94fc SHA-256: c4a2ba47d962d3a372f41a696dc2a975ef6ae179db99faacf9f2f8aafa0878c3
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/123?keyword=why+study+government+and+politics In PDF document text
    • https://pudozewo.weebly.com/uploads/1/3/4/3/134311846/282f2c3a.pdfIn PDF document text
    • https://giledaxije.weebly.com/uploads/1/3/4/3/134312043/78eee54c3a3c4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tetazino/paleo_diet_menu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1980/3036/files/95179449164.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a5e39bb-a693-4af8-bc2f-f949b3ca420a/30608511267.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/patterns_in_network_architecture.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3824/4503/files/la_noire_xbox_one_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/78519246236.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/0889/0283/files/quistis_blue_magic_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/phillies_season_tickets.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_off00005fd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD3 5664 bytes
SHA-256: 93c9741d59f421802902a5508a8ac90be5d9ad0e1f66840f31ff3dde51ec4d0b
font_01_sfnt_off00007309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7309 12200 bytes
SHA-256: 1b65ed7dc4d8481e42cac524b542589a441d0d3ade8b3d9526fec76628cbad62

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