Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fb25ae32cf9de4c…

MALICIOUS

PDF

97.9 KB Created: 2020-09-20 09:40:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 828b89f1229fbe6b02cc7d41c716a887 SHA-1: d53f3045677fa7008ccaaf80e7a286c30bfb305e SHA-256: 0fb25ae32cf9de4c8b95efb70b71a9cd44ddb80ad0bf7b5804a26af3c590c4b1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for a link to known malicious redirector infrastructure. The document contains a large number of embedded URLs, many of which point to PDF files hosted on various domains, suggesting a link farm designed to obscure the ultimate destination. The primary malicious URL identified is https://ttraff.com/wix?keyword=%25D8%25AF%25D8%25A7%25D9%2586%25D9%2584%25D9%2588%25D8%25AF+%25D8%25B3%25D8%25A7%25DB%258C%25D9%2581%25D9%2588%25D9%2586+3+%25D9%2586%25D8%25B3%25D8%25AE%25D9%2587+%25D9%2588%25DB%258C%25D9%2586%25D8%25AF%25D9%2588%25D8%25B2, which likely serves as a gateway to further malicious 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/wix?keyword=%25D8%25AF%25D8%25A7%25D9%2586%25D9%2584%25D9%2588%25D8%25AF+%25D8%25B3%25D8%25A7%25DB%258C%25D9%2581%25D9%2588%25D9%2586+3+%25D9%2586%25D8%25B3%25D8%25AE%25D9%2587+%25D9%2588%25DB%258C%25D9%2586%25D8%25AF%25D9%2588%25D8%25B2
    • http://kadodevi.adelantechc.org/uploads/1/3/2/6/132682878/siwiruba-lebuduj-bunibuzowiwo-vofuxa.pdf
    • http://files.ancient2new.com/uploads/1/3/2/6/132696598/lewavizovuduzilekem.pdf
    • http://files.budleighfilm.org.uk/uploads/1/3/2/6/132696512/3948791.pdf
    • http://refas.laurogers.com/uploads/1/3/2/3/132302978/642f3f2b.pdf
    • http://files.zmfarabian.com/uploads/1/3/2/8/132814305/batokegejilaxit_mewodivilade_supuxez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d55a13a3-96fd-432a-90d6-f7926e95b0a4.filesusr.com/ugd/1b7c00_eec988a4c7c8483385ef025a9f0228e3.pdf?index=true
    • https://7b9f372a-1c43-469a-bbb0-f579c2efb0ed.filesusr.com/ugd/035627_4b64b80806fa4203b710b9e3de22ffa1.pdf?index=true
    • https://c6cdeb8e-cd8a-4ce4-9a0a-fe7265ea9bc7.filesusr.com/ugd/cd79e3_edc01dfb296c497a82935116fc5c1e12.pdf?index=true
    • https://f3739a28-45e9-417a-9933-8e1311ab9491.filesusr.com/ugd/97634b_46837c4c860241d19e37f592cca8b7fb.pdf?index=true
    • https://b71f1462-49e6-44d5-a462-ba913a47b9d7.filesusr.com/ugd/cc207a_9ef8ee00ea2843e4a9b360a4bc18648b.pdf?index=true
    • https://d040d851-6f48-4957-95aa-d8d3a728b35a.filesusr.com/ugd/b14caa_54cbd0e31ce04c3bab8cdf2d609b6f5a.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0429/4246/4163/files/28622669057.pdf
    • https://cdn.shopify.com/s/files/1/0448/2105/3600/files/building_construction_sp_arora_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/2024/7462/files/gumusugepesekisuxis.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00013e89.bin
b1e8a1d75b02c1bb8ab02fc7d9c66065db5cd4d05b650a45b30c79d1d7acae32		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13E89 32200 bytes
font_00_sfnt_off0000f003.bin
be3eba7b4db1054a97c15c866c8d01df3ea7645ca5136751f6905876363bf97b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF003 4232 bytes
font_01_sfnt_off0000fe7d.bin
13d55b46a78138ce88f64ea7a80436eea5d2292e4eb9e6e3a13ea7362b1b6bf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7D 10684 bytes
font_02_sfnt_off0001234c.bin
4d7c052775533b0097596df5bd06f8250b0c077f0b8989294657d0f4bf3693e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1234C 17952 bytes

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