Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ffca48fdf9ec933…

MALICIOUS

PDF

39.8 KB Created: 2020-09-20 04:54:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 923791b2a573c61ffd9401ad538c21a8 SHA-1: da1cf6078766dfd6c7027b14de467438896cf769 SHA-256: 7ffca48fdf9ec9335d93e4db5dc3c104e1f81e63c588b40bcd350c484050c3cc
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to external websites. One of these URLs, https://ttraff.club/wix?keyword=perspective+worksheets+free, is flagged as a malicious redirector. The document's structure and content suggest it is designed to lure users into clicking these links, potentially leading to further malicious activity or phishing attempts.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.club/wix?keyword=perspective+worksheets+free
    • http://files.leadersoflanier.com/uploads/1/3/1/3/131384718/xetaturosugurubupeve.pdf
    • http://files.murielkneeshaw.com/uploads/1/3/2/6/132696335/c7d1ec680cf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1be29bbc-a357-48da-8489-9a900014be1f.filesusr.com/ugd/2e4eb4_a331f05856f24af68f1508712d21eec5.pdf?index=true
    • https://7b210906-f728-4388-b480-a510c151719c.filesusr.com/ugd/850f07_fb170b6980be4b3d955d303a4ad85c8c.pdf?index=true
    • https://cc0dad3f-58fa-4282-8797-9599622205ec.filesusr.com/ugd/b96e41_8dc8b9269c1545fb9091f39d09ec4fb1.pdf?index=true
    • https://79a463be-abc4-4d9e-8e16-6abcf3ecc750.filesusr.com/ugd/f08e01_0068bce556904696bfda5ead21c91b7f.pdf?index=true
    • https://869217da-dcc2-43da-a6b8-30e3b04a8d2f.filesusr.com/ugd/e54fc7_4387a3e909bd4e0daba4a6b05e90ac9c.pdf?index=true
    • https://19b7e055-14eb-43bf-a0aa-9bb0445f3945.filesusr.com/ugd/fef806_30148405c066471bb08449eefbf21889.pdf?index=true
    • https://c9c92a93-9d31-4ca3-9f65-490b673f477d.filesusr.com/ugd/32acb1_ad24cfbfe28c436487b9afb48269b20c.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0437/1356/0731/files/womawuzusanipumeri.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/wugudusapawexixabud.pdf
    • https://cdn.shopify.com/s/files/1/0437/2794/5879/files/13270612432.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_off00005dd6.bin
79209f541e55b04902d478460f5ef4fea80979ef971304a834eeacb64515b8ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD6 5076 bytes
font_01_sfnt_off00006f30.bin
73577e48397929fda18b16aa3e592058a707485784eb6925d12b4e8d8684b462		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F30 10396 bytes

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