Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca2ee329a0f54e63…

MALICIOUS

PDF

41.2 KB Created: 2020-08-20 11:13:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 761cbce46f97e9b43934d2ef8d84f4d3 SHA-1: 7e919d201c99bea647127f71672531408a95b260 SHA-256: ca2ee329a0f54e634b042a6c0f11716858e93c60c0b06143b32b9f6b3a5103fe
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.cc/pify?keyword=symmetry+worksheets+6th+grade In PDF document text
    • http://files.mandyfitzgerald.com/uploads/1/3/0/7/130739369/pomerevarusufefisa.pdfIn PDF document text
    • http://files.theyellowjacket.com/uploads/1/3/1/4/131453436/xipogixidarasuzu.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/1/0434/1415/9521/files/discrete_fourier_analysis_and_wavelets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5038/5051/files/dofowipapebugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8844/5591/files/28729101233.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4488/7966/files/tudezovazeworenanalewes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3167/3504/files/mezeloseluwuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9490/7810/files/sawugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4622/4540/files/lagodelazil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8259/6000/files/39476917728.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6732/6110/files/michelin_guide_london_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0718/6843/files/jogusivogadere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2391/7475/files/95627646211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7526/4919/files/57544164745.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2423/6199/files/attributeerror_lower_not_found.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1701/7256/files/41889515725.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_off00006272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6272 5720 bytes
SHA-256: 5acec52fe8f170538dcadcad11fc0333ed588dcb81685ef57c3b43c72bd127b9
font_01_sfnt_off000075d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D8 9960 bytes
SHA-256: 8223ac0da0d6cf45c96ba5b68dc2b6b2c58b2f4a994d34c4399429d1624f260e

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