Malicious PDF — malware analysis report

Static analysis result for SHA-256 4507185da7cfc94c…

MALICIOUS

PDF

43.3 KB Created: 2020-08-22 05:21:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d22ebc456f1c2af6b182df54cb5da02a SHA-1: f846d19a77dc56e0aac089ef7c3044f2d541af0d SHA-256: 4507185da7cfc94cbecf2e43f71d7ecaeb906b7d3357ecba9d7fc93a1b27e4dc
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm designed to appear as legitimate content, but the primary link redirects to a known malicious infrastructure. The document body is heavily obfuscated and contains the malicious URL, suggesting an attempt to disguise its true purpose. The presence of numerous links to Shopify-hosted PDFs indicates a coordinated effort to obscure the malicious redirector.

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://ttraff.com/pify?keyword=music+worldwide+free
    • http://files.blissfulbeautopia.com/uploads/1/3/1/4/131437924/f4172fec3.pdf
    • http://luzude.columsands.com/uploads/1/3/1/3/131398272/1588115.pdf
    • https://cdn.shopify.com/s/files/1/0438/3562/1526/files/85720394376.pdf
    • https://cdn.shopify.com/s/files/1/0430/0275/7281/files/57880254249.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/84477954511.pdf
    • https://cdn.shopify.com/s/files/1/0435/2193/3466/files/fewurote.pdf
    • https://cdn.shopify.com/s/files/1/0438/2877/3021/files/bupumonexotikaxosijebopu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5554/5497/files/47032057763.pdf
    • https://cdn.shopify.com/s/files/1/0431/1701/9292/files/aseptic_non_touch_technique.pdf
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/tamutedizoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/2823/3887/files/3999359615.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/95263043979.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3762/files/3595924688.pdf
    • https://cdn.shopify.com/s/files/1/0435/8032/6051/files/a_level_past_papers_physics.pdf
    • https://cdn.shopify.com/s/files/1/0438/0200/1570/files/jorisudisituvudire.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057c4.bin
49819f0f7e6917a677b7f3ecba9d4dfd133b93411fa035a09e8c43f2fce8eada
pdf-font-stream PDF embedded font (sfnt) at offset 0x57C4 4600 bytes
font_01_sfnt_off00006787.bin
6fa2f8a15e20154f2eb3381dea639c2e58bd2f4133145f60d146cb5b9d711cce
pdf-font-stream PDF embedded font (sfnt) at offset 0x6787 12544 bytes
font_02_sfnt_off00009270.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x9270 4324 bytes