Malicious PDF — malware analysis report

Static analysis result for SHA-256 714a2aeb8c6eb5ed…

MALICIOUS

PDF

42.8 KB Created: 2020-08-30 23:33:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37504e11353b8e70be51162b8ccec157 SHA-1: 892787e8533b8f346b981f4dca03f8cd0bfb640c SHA-256: 714a2aeb8c6eb5ed22f52a0b3375a86c12f54d1a5f904ea390cd0f0c167f7c4c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by an ML classifier and contains a link to a known malicious redirector. It also features a large number of embedded links, many pointing to Shopify, suggesting a link farm or SEO manipulation tactic. The document body, though partially corrupted, contains the title 'Rito de la confirmacion' and the wkhtmltopdf generator information, indicating it was likely generated to host these links.

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.ru/wix?keyword=rito+de+la+confirmacion
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/9183/5547/files/gataxerevapisisulejunigor.pdf
    • https://cdn.shopify.com/s/files/1/0435/8864/9123/files/android_studio_gitignore.pdf
    • https://cdn.shopify.com/s/files/1/0435/1138/2170/files/13329625683.pdf
    • https://cdn.shopify.com/s/files/1/0432/2846/3271/files/lozotubufexuvapexofuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/6775/2099/files/amparo_directo_en_materia_civil_formato.pdf
    • https://static.usrfiles.com/ugd/12f4eb_0d4a941b37dd4ba1b660304b1c912ad7.pdf
    • https://static.usrfiles.com/ugd/ace02d_db3293d259294c0dbd2b5e84af86e4cf.pdf
    • https://static.usrfiles.com/ugd/b8c837_38dddddc7c7e49d583fa979dad88aae9.pdf
    • https://static.usrfiles.com/ugd/2c608b_76d7fd8f2483404895ccd2dda05dd78c.pdf
    • https://static.usrfiles.com/ugd/b8c837_0dbb8c5f67c64c6e89d56df9f1fa27d9.pdf
    • https://static.usrfiles.com/ugd/173616_c5febeb66ffc442b8d0fcd74518e88ce.pdf
    • https://static.usrfiles.com/ugd/a76634_0f4e1c3286e54b98b50a08def88883b3.pdf
    • https://static.usrfiles.com/ugd/8e1900_f48b03b3d85e4b5198db2561c1d66a9b.pdf
    • https://static.usrfiles.com/ugd/dcfb95_2c844cc5d30641caadbba268ddeac19f.pdf
    • https://static.usrfiles.com/ugd/735424_b58a776e8ec84bb6947c3c1e393b31c2.pdf
    • https://static.usrfiles.com/ugd/e8506d_da48a6c3b88b42308afaeab0d0a643cc.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_8fe5c741415f45f2afdcf79a7cbe846d.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_off0000699f.bin
83c48f93bb61dbd1633b21f4a3d22277c4f47711113507d91d6910bf644ebef9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x699F 4996 bytes
font_01_sfnt_off00007a84.bin
79c02ff66c1a46ac92d72ab58bfafcc4a130d13db5f63cca423b8ea118ec80e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A84 10608 bytes

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