Malicious PDF — malware analysis report

Static analysis result for SHA-256 579e4b9dae9b7c86…

MALICIOUS

PDF

60.3 KB Created: 2020-11-01 07:31:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: dfda4de688672e72e2a06941bd2efeb1 SHA-1: dfbd68e13247918a98cad83c4b8509747cf2c2b5 SHA-256: 579e4b9dae9b7c86eb983200a61cec8cda7d86e1124abe21b8eecbe3174fa06a
214 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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=spokane+county+court+records In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388426/normal_5f979b23aed39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381291/normal_5f8d3b86446e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371498/normal_5f89cdb121dde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403270/normal_5f995b540ac12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369331/normal_5f8820ee09068.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f8d5fc9b5a9b.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/1/0505/0777/6162/files/28484994145.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/callan_method_stage_1_chomikuj.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/83448969949.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7819/8464/files/skyrim_dragon_scales.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/orpheus_descending.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/graco_nautilus_elite_car_seat_instructions.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000b6a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB6A5 25404 bytes
SHA-256: 979b003ec9694c1ac3960871fbc9b4b3d5698217e7a5052237d03915223b5e66
font_00_sfnt_off00007e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8C 5304 bytes
SHA-256: 327bfd1bf35cdf203f624ca0b1f8d2e6766d8578b28062b8465bc67fdca081fc
font_01_sfnt_off000090b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90B2 11100 bytes
SHA-256: f22943231e2ba720dc8d106d2c741d8eb4e9ea92a4dc9c9f75e8bf290e9bf657

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