Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc7a064021ef9bd4…

MALICIOUS

PDF

131.8 KB Created: 2020-07-09 07:14:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: d589e066b1463d76dcdc03df64cf2934 SHA-1: c0f549b4a2b1b502c62fbd6025382d0db79c10c6 SHA-256: cc7a064021ef9bd49a6140655ae949516eb8aa82a44656230ef92c38d373f3c5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by a machine learning classifier as malicious and contains a large number of embedded links, many of which point to suspicious domains. One critical heuristic identified a link to a known malicious redirector infrastructure. The document body contains obfuscated text and a URL that likely serves as a lure or initial stage for a malicious download.

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/wb?keyword=manual%20de%20convivencia%20escolar%20sep%20pdf In PDF document text
    • http://files.twobeesapiary.com/uploads/1/3/0/7/130775131/6dd7dc391e.pdfIn PDF document text
    • http://files.ajharrisphotography.com/uploads/1/3/1/3/131383737/8727016.pdfIn PDF document text
    • http://files.atlantadentalanesthesia.com/uploads/1/3/1/4/131455883/najikenusapijevofifu.pdfIn PDF document text
    • http://files.mountainvilleumc.com/uploads/1/3/1/4/131482828/fifob.pdfIn PDF document text
    • http://files.mysvdpparish.org/uploads/1/3/1/3/131384735/9562528.pdfIn PDF document text
    • http://files.rebeccalynnphotography.net/uploads/1/3/0/8/130874518/4840188.pdfIn PDF document text
    • http://files.theyogaterminal.co.uk/uploads/1/3/1/3/131379776/zulowixawomali.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://motifomimiwa.files.wordpress.com/2020/06/vojazutebup.pdfIn PDF document text
    • https://gudosixen.files.wordpress.com/2020/07/satizikoxiwutunadogizovo.pdfIn PDF document text
    • https://gunuzajapaj.files.wordpress.com/2020/06/6106650749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/totavari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/potiwabuvufepatene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17721531589.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wonazonuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dusegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9467339244.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001cc5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CC5B 5016 bytes
SHA-256: 73b7203015b4f76dd12b8bbede0da744b062d42c4bdf4da433eeb476e60bf48b
font_01_sfnt_off0001dd71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DD71 11364 bytes
SHA-256: c51199c62b6e27d4d1964b7beaa68f4fd63c4fe150e8f6a8d608be3fda9a9f4f

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