Malicious PDF — malware analysis report

Static analysis result for SHA-256 c535e9a0068a3a02…

MALICIOUS

PDF

43.7 KB Created: 2020-08-09 05:58:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3700e48ab695f1e77b21acef3557916 SHA-1: 01d668a110227a6b6d0a133afccffb93f6290296 SHA-256: c535e9a0068a3a02a9086bda44383356c40433d2c41a4114d82a4979ad4430c3
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.cc/pify?keyword=apprendre+francais+oral+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting the primary intent is to redirect the user to malicious content. The presence of numerous links and the use of a redirector indicate a phishing or credential harvesting attempt.

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.cc/pify?keyword=apprendre+francais+oral+pdf
    • http://kovanepi.digcitinstitute.com/uploads/1/3/1/4/131407995/zegugogi_mitasovoxixem_nijabiposedixa_zilopasosamim.pdf
    • http://files.createwithease.com/uploads/1/3/1/6/131636987/c0fbb4.pdf
    • http://files.pmcipoolsspas.com/uploads/1/3/2/7/132712413/9403956.pdf
    • https://cdn.shopify.com/s/files/1/0447/8458/2813/files/10_digit_number_generator.pdf
    • https://cdn.shopify.com/s/files/1/0435/2904/4119/files/dled_assignment_front_page.pdf
    • https://cdn.shopify.com/s/files/1/0433/9076/3175/files/nibaxipagerupawezedomu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6291/0376/files/91811971856.pdf
    • https://cdn.shopify.com/s/files/1/0433/6641/6534/files/4530373616.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/86878549222.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27392185694.pdf
    • https://cdn.shopify.com/s/files/1/0437/1303/6439/files/basic_english_translation_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/5082/7929/files/reketibefebowekuwexisulo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9703/7730/files/kesifokararodulexaxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/9534/9666/files/super_smash_flash_2_unlockables.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_off00006b29.bin
f8f01ea93e878cc11ba9a49a98833b1694944773db155742a43df2d274795e78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B29 5140 bytes
font_01_sfnt_off00007cb8.bin
3a0ee6c0ce4e6a48c2178d6f9a4192be56a96a95c350362c7b1cdb4e5a54a4f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB8 11284 bytes

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