Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d0e085ffc5eb050…

MALICIOUS

PDF

49.7 KB Created: 2020-08-27 20:07:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d04535cd3e56add12a662e448effe93b SHA-1: 6d5d832946ddb4d1d5088c0663f4b47c3369af41 SHA-256: 7d0e085ffc5eb05018ba4176a7812bff49619bcd2357911f1a6a0b6e140b0084
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, one of which, https://ttraff.com/pify?keyword=la+semana+laboral+de+4+horas+pdf, is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain references to the same URL and other Shopify-hosted PDF files, suggesting a link farm or redirection tactic. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to redirect users to harmful content.

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=la+semana+laboral+de+4+horas+pdf
    • http://files.lashtagsupply.com/uploads/1/3/0/9/130969686/5529314.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/6387/8566/files/35843499692.pdf
    • https://cdn.shopify.com/s/files/1/0430/1311/1961/files/gebapamerewub.pdf
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/tolag.pdf
    • https://cdn.shopify.com/s/files/1/0433/1362/7294/files/globalisasi_dalam_hubungan_internasional.pdf
    • https://cdn.shopify.com/s/files/1/0435/8501/1871/files/lisegagifuwugevafawadopax.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/vizakumarerivobod.pdf
    • https://cdn.shopify.com/s/files/1/0436/8292/2646/files/international_economics_pugel_15th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32177526878.pdf
    • https://cdn.shopify.com/s/files/1/0430/1167/0179/files/loudest_song_ever.pdf
    • https://cdn.shopify.com/s/files/1/0454/3338/9214/files/salebixatubarezifanev.pdf
    • https://cdn.shopify.com/s/files/1/0434/8755/9833/files/kelilusisiregiw.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a0b.bin
2e2815b4b4bdb52e24ee04d7163516dd3300cd04b0c674df7498afa9bec3c659		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0B 5448 bytes
font_01_sfnt_off00007c62.bin
8d80c831e0baba63fe59ca32ea06704fb0b74bb2f1e2af32c9e1740c874b6422		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C62 11648 bytes
font_02_sfnt_off0000a263.bin
fb2ac63fb075d256b5587570191ecec806cb29c29da4ebedfc8653ce907d9040		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA263 16384 bytes

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