Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c7537ba579b75bc…

MALICIOUS

PDF

68.0 KB Created: 2020-08-20 22:09:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6734bb9831901c121426681231c14279 SHA-1: 944973c0ee46880842d3ee17d28cd17d1b406aa1 SHA-256: 0c7537ba579b75bcf0bf2e8ff2897561f6573ce3adfa6cc0c8cab708eed3b45e
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination and evade detection. The document body, though heavily obfuscated, contains the same URL and appears to be a lure, possibly related to a link farm for SEO poisoning. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=diccionario+biblico+que+significa+languidece
    • http://wujaw.rmshiles.com/uploads/1/3/1/0/131070450/636b1b.pdf
    • http://gasikof.monumentalbeginningsdoula.com/uploads/1/3/2/6/132695601/d8a54.pdf
    • http://files.mattjonesfiction.com/uploads/1/3/0/7/130739742/b2a6ee77cdd581.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0443/6302/2492/files/apsrtc_bus_pass_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/3706/4348/files/89980778649.pdf
    • https://cdn.shopify.com/s/files/1/0431/1184/1949/files/lezogidukepidaxoma.pdf
    • https://cdn.shopify.com/s/files/1/0429/6412/3814/files/nombre_de_los_perfiles_de_aluminio_para_ventanas.pdf
    • https://cdn.shopify.com/s/files/1/0429/3630/3782/files/zatik.pdf
    • https://cdn.shopify.com/s/files/1/0437/6605/5063/files/23973310434.pdf
    • https://cdn.shopify.com/s/files/1/0447/7698/0629/files/46130861541.pdf
    • https://cdn.shopify.com/s/files/1/0433/8994/3971/files/bocio_nodular.pdf
    • https://cdn.shopify.com/s/files/1/0439/4831/0683/files/vidulo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6638/2746/files/2040_john_deere.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/zopoxapekuziraxorefugi.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://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064a7.bin
82ec0f826ad98a8454a7dc8541b7ce446e4d2211298e00c770408cf199e2c9bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A7 5240 bytes
font_01_sfnt_off000076dc.bin
83bda026c369deef1fb183b6adfe7cca90308e68b8fa34c974c4e6a8a8ba67a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76DC 5456 bytes
font_02_sfnt_off0000895f.bin
e003d381706bd4acd63125d220e4f97b7c03a7de02500cab00c1e583f7b973b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x895F 2232 bytes
font_03_sfnt_off00009342.bin
145a9cf8b415971dae9661b9a697625a3a6e4b0ee2b2e3cbef74af597e991c23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9342 5036 bytes
font_04_sfnt_off0000a3a5.bin
555ad3bbfae52c5484f3b04cbc558ad8ec19e3881e9f62637709908e71fc88ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3A5 17648 bytes
font_05_sfnt_off0000d905.bin
cbbf20ec95cb654881a8b87ee85051aa94fb3755de383a88024ab118cc31a2fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD905 16452 bytes
font_06_sfnt_off0000ef9e.bin
cf4ecdd98a66ead2101b5edb511417fb50e49e0013990388cdcc92d1fabcf0e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9E 3848 bytes

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