Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b2ecf07f989e093…

MALICIOUS

PDF

46.6 KB Created: 2020-07-28 03:22:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6144ab4c01f6e97ae12d6c44f436418c SHA-1: 7e46dd01715c95163eefccf72b0c9cad1e909dab SHA-256: 9b2ecf07f989e093cbf2f098da97a2f223bbb9a7318c386351d190e700dbdb6a
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.cc/pify?keyword=annual+credit+report+free+experian In PDF document text
    • http://files.learndeveloplive.com/uploads/1/3/1/0/131071063/b5497b89dcb5e.pdfIn PDF document text
    • http://files.linkrenovations.com/uploads/1/3/1/6/131606494/40fdba1593a.pdfIn PDF document text
    • http://files.easingwoldartex.org/uploads/1/3/2/6/132696214/gotejidogewob.pdfIn PDF document text
    • http://files.firststreettoycompany.com/uploads/1/3/0/7/130775366/614bc3153.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/1/0433/9413/8277/files/42339818381.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2167/2341/files/98563715514.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1638/0831/files/12603546745.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5538/0630/files/nekeluzev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/20051686302.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/soxudafetigefotogipokuja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/90187003749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3732/5462/files/xefaminaluzeronebixareb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2637/5071/files/vasuwafazawokubegul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5698/0377/files/xokilajof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7594/5113/files/gamutufizedenozuzupi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/suwupoxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/pimuwo.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_off00007a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A38 4908 bytes
SHA-256: 457f1acfdd7341112d89c68d0c9d7de13cd009dea2b7547fe968415fdfb4e18c
font_01_sfnt_off00008aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AED 10072 bytes
SHA-256: 85bcae9891df20a1f33673d03beb739afbca4287080fbc830be52a26089dd94f

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