Malicious PDF — malware analysis report

Static analysis result for SHA-256 357bcb83871c6974…

MALICIOUS

PDF

42.1 KB Created: 2020-08-18 17:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99095348ddd64be5360eeb52cf0614dd SHA-1: 9a1dc385aca49a10bf29fb73428bc632ff3c9c0d SHA-256: 357bcb83871c69747485b24ab13a9ce95f00ada6043fa5d66e802667276ac5c8
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The embedded URL 'https://ttraff.ru/pify?keyword=airport+utility+apple' is identified as a known malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting the primary purpose is to lure users to this malicious site.

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.ru/pify?keyword=airport+utility+apple
    • http://files.verarey.com/uploads/1/3/1/1/131164129/3095173.pdf
    • http://files.rivieranannies.fr/uploads/1/3/0/7/130739480/29d97.pdf
    • http://nagasesi.truluckcharms.com/uploads/1/3/2/7/132712615/1198595.pdf
    • https://cdn.shopify.com/s/files/1/0436/9635/7530/files/fisut.pdf
    • https://cdn.shopify.com/s/files/1/0435/7432/9507/files/kijaxe.pdf
    • https://cdn.shopify.com/s/files/1/0432/0323/1908/files/22117747876.pdf
    • https://cdn.shopify.com/s/files/1/0440/6693/0840/files/fitufafamirikadozak.pdf
    • https://cdn.shopify.com/s/files/1/0431/4093/9933/files/saworajoka.pdf
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/calendario_julio_agosto_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3288/files/manualidades_faciles_para_halloween_paso_a_paso.pdf
    • https://cdn.shopify.com/s/files/1/0435/4595/2408/files/tamil_book_filetype.pdf
    • https://cdn.shopify.com/s/files/1/0431/0394/4853/files/jinazaxuru.pdf
    • https://cdn.shopify.com/s/files/1/0435/7554/1919/files/lowes_west_st_paul.pdf
    • https://cdn.shopify.com/s/files/1/0439/3923/3960/files/budget_speech_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/3964/6108/files/wibiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/0781/9422/files/89286495751.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_off000066fd.bin
3ee06939f6864da2edaac710afa422387622885c1e96d95c7fb4dd45f2bc9799		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66FD 4724 bytes
font_01_sfnt_off00007723.bin
0db0646b03b74279576e97cde4991bc91aef023353e94f4530ac06803c372e9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7723 10684 bytes

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