Malicious PDF — malware analysis report

Static analysis result for SHA-256 8854b66717891506…

MALICIOUS

PDF

45.6 KB Created: 2020-11-01 07:41:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb99634c1a96abf531a05028e5cb0c14 SHA-1: 7573dfa387bb8c1583b8417bec3beb837d9c3812 SHA-256: 8854b66717891506286fcde429a04dfbe2e2d254bd4e208dc03d8f227256d0c8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains multiple embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, includes text related to funeral homes and a URL that appears to be part of a link farm. The ML classifier strongly indicates maliciousness, and the presence of a malicious redirector suggests an attempt to lead the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ggtraff.ru/aws?keyword=elkin+north+carolina+funeral+homes
    • https://cdn-cms.f-static.net/uploads/4374700/normal_5f8c7313c7ed1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e32be21e-7200-4a92-b777-d92c59171737/mrs._flowers_a_moment_of_friendship.pdf
    • https://s3.amazonaws.com/buxoparadazegu/36109379097.pdf
    • https://uploads.strikinglycdn.com/files/01973edb-aecf-4a0d-a23d-2b6d504b929d/descargar_musica_gratis_de_jenny_rivera_mirame.pdf
    • https://uploads.strikinglycdn.com/files/deec9bb3-c395-4166-82a3-d19378fe1b98/vapubosizupoxupopopojoli.pdf
    • https://cdn.shopify.com/s/files/1/0496/0462/4548/files/9567891614.pdf
    • https://uploads.strikinglycdn.com/files/06c43d67-dd77-49c8-b7f4-f58c6fda6238/87655918926.pdf
    • https://uploads.strikinglycdn.com/files/45b9a5fb-8ab3-4a6c-9455-8d95d7dffc4a/mevipi.pdf
    • https://uploads.strikinglycdn.com/files/69c4775c-94be-4ced-8402-cd367a1f05f7/bulowuvaxoxiv.pdf
    • https://uploads.strikinglycdn.com/files/5fccdb34-df2b-421e-b840-45ddf1fc6e9b/keritoxu.pdf
    • https://uploads.strikinglycdn.com/files/f236d5a5-bfdd-436a-9c81-58af227ff430/ketimamixemilifosepi.pdf
    • https://cdn.shopify.com/s/files/1/0502/4514/0657/files/duermete_nio_descargar_gratis.pdf
    • https://uploads.strikinglycdn.com/files/b7a4b121-3ee3-4887-98db-6aea5edc36bb/36290627507.pdf
    • https://uploads.strikinglycdn.com/files/b57ed67d-7c8d-40c3-8213-5f50f5af563e/horror_from_the_deep_osrs_runehq.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007362.bin
9b3d20bdbc4c51ad8450aca7087c87b867c58fbb6c4d8f30f1f08d8f6bb434ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7362 5140 bytes
font_01_sfnt_off000084bc.bin
bc60de024323d78db62bb7f7e85b53bec9a304479d3767f2ec019085ba738dff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84BC 10840 bytes

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