Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a9d6e810a063c6…

MALICIOUS

PDF

44.9 KB Created: 2020-08-02 07:14:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a0ad69903a3f27846b05915b059530ed SHA-1: 62633df698f03480a354bc4bb77b28851e25727b SHA-256: 50a9d6e810a063c61a127e87a5a4efde7e291d22490fc1e2ed48aea963cfd3c8
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=dog+pecker+mushrooms In PDF document text
    • http://files.thehomosofharmonyhaven.com/uploads/1/3/1/4/131452904/1316718.pdfIn PDF document text
    • http://files.decoupeurindonesia.com/uploads/1/3/1/6/131607467/pabasatax_mirurusamaj_vazab.pdfIn PDF document text
    • http://files.spunglasstheatre.com/uploads/1/3/1/4/131453194/5633219d42a.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/1/0435/0086/3643/files/human_relations_theory_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2449/8333/files/gowefiditirenewipubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dojedeteremedadedarovir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6845/6086/files/9588257138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1338/2044/files/10610879072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9759/4786/files/daxozumu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3634/2434/files/86927473860.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/libidurekatomanazavevufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8807/7209/files/38315274419.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3039/5552/files/31671744542.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4993/4231/files/48721481974.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_off000072d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72D8 5168 bytes
SHA-256: a6557ac1980940e43c1836e3ad64b0d8b05494c9d262eac2389c3b381171811c
font_01_sfnt_off00008454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8454 9996 bytes
SHA-256: 76ca06b58cfb07f0901823b3718b0a69fcff7e0a9e44669978b9862f56ef0257

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