Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0223b4fa84cd7d8…

MALICIOUS

PDF

41.6 KB Created: 2020-08-28 11:54:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a38edc8bf9a7918634d5af806db98b7 SHA-1: 6814aae638e9c8f15e3ef695d5219e6fb62c9347 SHA-256: b0223b4fa84cd7d83f8c1d03a8ed24932e432d56a27dcdda225577f2f82ddd9c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, with a critical heuristic firing for a malicious redirector. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is https://ttraff.com/pify?keyword=programme+math+bts+electrotechnique, which is likely used to redirect users to further malicious content. The document body is heavily obfuscated and contains numerous URLs, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=programme+math+bts+electrotechnique
    • http://files.charmedbordercollies.com/uploads/1/3/1/4/131453355/jidetutopu-pogujem-vawizusomir.pdf
    • http://waxop.wenyuren.com/uploads/1/3/1/6/131606968/147963.pdf
    • http://files.pheasantruncavaliers.com/uploads/1/3/2/6/132682929/b6d0fae250c.pdf
    • https://cdn.shopify.com/s/files/1/0434/5780/6503/files/mabotumafulanenoda.pdf
    • https://cdn.shopify.com/s/files/1/0435/5407/8871/files/bihar_board_10th_result_2018_ka_marksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/8529/1937/files/28022318403.pdf
    • https://cdn.shopify.com/s/files/1/0427/8570/2054/files/robo_en_la_noche_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/2122/1533/files/minecraft_crafting_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/6991/4782/files/83395308769.pdf
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/ziguzekamusipasefu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0411/6637/files/nets_of_3d_shapes_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/2973/3282/files/mibawasug.pdf
    • https://cdn.shopify.com/s/files/1/0429/9699/0105/files/57548471107.pdf
    • https://cdn.shopify.com/s/files/1/0428/3269/1367/files/ebay_storefront_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/porojokirimu.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000617c.bin
a35ad3b9ef652b26d67884d31b556880a1a714d2cc5a40f9ba40f7da49be0819		 pdf-font-stream PDF embedded font (sfnt) at offset 0x617C 5480 bytes
font_01_sfnt_off000073fa.bin
b654b08e1bc4e007a43371227a5110181266a4dd6824cd9b8f68ac248a731159		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73FA 11468 bytes

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