Malicious PDF — malware analysis report

Static analysis result for SHA-256 67930fb3e98db240…

MALICIOUS

PDF

51.4 KB Created: 2020-08-23 16:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ca7b906ae4dff819573489849e98fe92 SHA-1: 2c22294bbd747078819c1e26f79ace83a9d91d39 SHA-256: 67930fb3e98db24013b4e562972df7556278058721ee74f2a38ff13a3d979e12
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.ru/pify?keyword=injustice+gods+among+us+android+multiplayer In PDF document text
    • http://files.monsterotiqa.com/uploads/1/3/1/4/131409037/4b11bc0e9f02.pdfIn PDF document text
    • http://files.christineprietoarted.com/uploads/1/3/1/6/131636956/9d2420ea787ad73.pdfIn PDF document text
    • http://files.barnfeet.com/uploads/1/3/0/7/130775997/refumagu-jitevetojiwuti-nilok-tejawugedipe.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/1/0440/6935/5670/files/toro_electric_weed_eater.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6211/7023/files/goremosirugolofenix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/jaxosaraferuloserive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/moselasuvub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61051106257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7519/0422/files/xixenubosusidakugirivora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8466/7287/files/lego_akira_bike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4464/1695/files/sun_tracker_pontoon_boat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4854/2109/files/5268207897.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1998/5319/files/18729371236.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8838/0061/files/22972179758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0319/0181/files/13577063348.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_off000089dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89DC 5508 bytes
SHA-256: 483115658a354ced48693fae253dc9370640f86dab4b57eaf877c3beb563b52a
font_01_sfnt_off00009c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C8C 10588 bytes
SHA-256: 0086f0688e53a0e7b706e0dd3e883b18a0661a5d528a908a4a6e1ed5dca85f0d

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