Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb8ff03b3298a5e4…

MALICIOUS

PDF

47.9 KB Created: 2020-11-05 08:06:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: a88d76e0a9d44cef47838d2cb97313ec SHA-1: 0a5f5df7ac885bd6b9030a535d88bffc2fb9c523 SHA-256: bb8ff03b3298a5e4d534a27b67c0b21a597a90dbc40454e494fd229b1740a5ff
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=vitantonio+waffle+maker+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408879/normal_5fa3482f09f54.pdfIn PDF document text
    • https://tinalolovini.weebly.com/uploads/1/3/4/3/134371967/6047619.pdfIn PDF document text
    • https://lebabipiw.weebly.com/uploads/1/3/0/9/130968925/2a4f1e9a80.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/popagexexoza/city_car_driving_simulator_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2334779-73f0-4142-8a18-5741e4563443/61634634198.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/milapelusamuvaxunupomupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64ec7cb4-bd56-4a57-b008-7362608e497e/79455505353.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/worarinavukajusonavugox.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/big_ideas_math_algebra_2_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/slate_pool_tables_for_sale_perth.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/salerno_porcelain_tile_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/72461327044.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_off000072c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72C0 2952 bytes
SHA-256: 6f6c5a8fb5e62cfd2b6ff76f758e0f05a98695d5bac735cd019a42cb5e5649ba
font_01_sfnt_off00007d4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4D 4856 bytes
SHA-256: f52957c9118b32b8b37ad4e9e9d3dcdd5bb195329c062e156e8f0fcc4c0a2bcd
font_02_sfnt_off00008dd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD1 10892 bytes
SHA-256: a359c8f509bb712b8b17af74411327b1b05a28851ffee8edfcdac77ed1a1efbd