Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad47b8ebbafc186…

MALICIOUS

PDF

52.1 KB Created: 2020-08-09 01:35:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b01acd0a177c6b3000e8fd70bd906813 SHA-1: 26d8b935be2d6be33440557385a3e947c41081e3 SHA-256: 2ad47b8ebbafc1860514ee1cacc24dfe0f66179d71138cbf7606cbefe6692e7f
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.com/pify?keyword=bpsc+non+cadre+preliminary+syllabus+pdf In PDF document text
    • http://files.doulasinatlanta.com/uploads/1/3/2/6/132681336/762035.pdfIn PDF document text
    • http://files.livingthelifeworldwide.com/uploads/1/3/1/3/131398547/satugusunokup_pabira.pdfIn PDF document text
    • http://files.sandygateabc.com/uploads/1/3/2/3/132303163/sobir.pdfIn PDF document text
    • http://gufide.wellspringnazarene.com/uploads/1/3/1/6/131606407/aed85.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/1/0431/6528/6566/files/87998956183.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9516/2022/files/blood_type_b_food.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5987/9834/files/28737551354.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8397/2256/files/20587064367.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0496/7581/files/foxoxusivoril.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4828/7912/files/66907142033.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9265/6799/files/xilomixanopakob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8094/9659/files/capacitor_value.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/2249/5389/files/google_android_developer_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7851/6885/files/ledor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5907/5477/files/dependency_theory_criticism.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65DC 5592 bytes
SHA-256: 9220765454ef882d1c3beca16c07dd4202473dc1e4fd4a1350eb6feffd8afdcf
font_01_sfnt_off000078ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78CE 8900 bytes
SHA-256: 61cdd8a23ef90cec1a49b84de9cf08554a7511ce6289f6aa6e1e8a65483ff7fc
font_02_sfnt_off00009591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9591 13320 bytes
SHA-256: f80d3692a225a00123480c7624cb09058cf4029aef885ac3c1bcf6758fbbb71f

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