Malicious PDF — malware analysis report

Static analysis result for SHA-256 66b4a2d60ae99c4a…

MALICIOUS

PDF

47.5 KB Created: 2020-08-07 05:32:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9455f7c9355ec1800ba513c3ed555b8a SHA-1: 8baa4358e39e8dd6eb34e57675e014a0e2d5a4f9 SHA-256: 66b4a2d60ae99c4aacd40aa8101e02ec60a7f7b45f573314f69f25b752b89385
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, appears to contain the same malicious URL and several other links hosted on potentially compromised or malicious domains. This suggests the document's primary purpose is to direct users to malicious infrastructure, likely for further exploitation or phishing.

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.cc/pify?keyword=digestion+de+las+proteinas+pdf
    • http://jesizet.fpzuc.co/uploads/1/3/0/8/130874218/vinuzimadaja_nasasobej_lonokekin_lomekiwit.pdf
    • http://files.termarkleather.com/uploads/1/3/2/6/132682665/85b01c3aa355523.pdf
    • http://pikuzas.authorajbell.com/uploads/1/3/0/7/130738799/rowetag_vamazajum_miruwezaji_nenap.pdf
    • http://rolud.nestingowlstemple.com/uploads/1/3/1/1/131164250/6226288.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0510/0707/files/fixawaxajukudofaxusolajuf.pdf
    • https://cdn.shopify.com/s/files/1/0435/9749/6488/files/makalah_arteri_dan_vena_ulcer.pdf
    • https://cdn.shopify.com/s/files/1/0438/2484/0861/files/fuzzy_logic_algorithm.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/80217963772.pdf
    • https://cdn.shopify.com/s/files/1/0427/5775/0951/files/42171150004.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5400/files/42175342634.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/91335034857.pdf
    • https://cdn.shopify.com/s/files/1/0428/7053/8406/files/tezotuwakamajilumavase.pdf
    • https://cdn.shopify.com/s/files/1/0433/9371/2286/files/vepawivozimudatowazos.pdf
    • https://cdn.shopify.com/s/files/1/0431/7885/2507/files/vugadepudovusezinu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/23525585563.pdf
    • https://cdn.shopify.com/s/files/1/0430/7245/4807/files/18656561736.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_off00007a24.bin
1fdf379b453f3cad24be3f9c755e114158aac82fbf1c295bca95283a533ce8f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A24 5208 bytes
font_01_sfnt_off00008bf4.bin
04e8f50e37a7e09313c15d9c523a73e9b2da6d3d5c33145e79fa01613c0f9d9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF4 10812 bytes

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