Malicious PDF — malware analysis report

Static analysis result for SHA-256 98d9bfec44aded07…

MALICIOUS

PDF

44.8 KB Created: 2020-11-02 07:03:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: a2d879896e253471425580069e06ca71 SHA-1: 61ad63ad622cf96e04a8a67581c9dbac20ec8cce SHA-256: 98d9bfec44aded07d0450c77e77b814671ddddf47ef1fbd075be0747fe03ffbe
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://gettraff.ru/aws?keyword=house+kundarak+dwarf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384048/normal_5f8e4b565ee54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415519/normal_5f984bca7e669.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422876/normal_5f98340034997.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/temujonuwu/castrol_magnatec_5w-_40_c3.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/positive_attributes_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d230f50-43e7-497b-becb-7a6e650f0776/pathfinder_kingmaker_adventure_path.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/jitutomuzotademokuzojilun.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/bamorojofolib.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/monizujif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bb8f653-40b4-4c75-94fc-2994978596db/91828081632.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/3303/2371/files/83450579940.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9843/1381/files/juvisef.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_off00006f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F31 4984 bytes
SHA-256: 16c639a02268edd145001a5b4f71ac0e8161ac44e25451af5c0c1fe148d8f88b
font_01_sfnt_off00008047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8047 11672 bytes
SHA-256: feceb9500e2d0dbf6c34399bdcd7cde9c533c418a1782cbbc5ee141687449f8f