Malicious PDF — malware analysis report

Static analysis result for SHA-256 61b0d6f5940b4716…

MALICIOUS

PDF

39.6 KB Created: 2020-08-22 17:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: dd395cfff3e3241702ba3a784790d7dc SHA-1: 6c2a4f2b59c0b798f16845e96e1c6a57dd159791 SHA-256: 61b0d6f5940b47169cb5b50744a23356614c773422b0c55d7ff2f7acd1dfc40b
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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.com/pify?keyword=maharaja+agrasen+public+school+admission+form In PDF document text
    • http://tunaz.glasgowmtairport.com/uploads/1/3/1/3/131383483/5100595.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/1/0433/0687/7080/files/mogapusezonoxifetomo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/pokemon_mystery_dungeon_red_rescue_team_quiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4642/0136/files/gogoxazosubamijawexutafe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9748/7512/files/degesijenanopepifuxonuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8399/6063/files/15933931618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3798/2869/files/nakaxidabakeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3373/9932/files/nivimapibamovivavekalusil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8832/1435/files/23252298290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3050/2806/files/pugepiwexilewuxekudanid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/zadidalexebimoziremew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6875/2023/files/62065162893.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4482/3452/files/ielts_writing_task_1_sample_answers_band_9.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_off00005722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5722 5788 bytes
SHA-256: 8a1896e2a5e495f6dce61a46e7618904720f69c3180ab1ea8a0d9074a9998727
font_01_sfnt_off00006ab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB1 10924 bytes
SHA-256: f4a128317d5a46b76a8624a812797cb7307a92693386b82091e7c5646cb5c501

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