Malicious PDF — malware analysis report

Static analysis result for SHA-256 48dfae417d13c248…

MALICIOUS

PDF

40.1 KB Created: 2020-08-20 04:20:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6af163925b63eb32a69c9fc497588ad SHA-1: 73f1c00ac5ce97c111ef22e5226ad335bd6fe69d SHA-256: 48dfae417d13c248ca7f5e9182f345a5f206989f2c0d6f01ef1f1542f9e6e6bf
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The document body, though heavily corrupted, contains text related to 'Android 8.0 Google Play Protect' and references to wkhtmltopdf, suggesting a lure related to device security or updates. The presence of a malicious redirector link indicates an attempt to lead the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious.

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=android+8.+0+google+play+protect
    • http://gurig.anrcdesign.com/uploads/1/3/2/6/132682883/kedavezisu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2856/files/83784887116.pdf
    • https://cdn.shopify.com/s/files/1/0432/7663/2214/files/c_to_f_converter.pdf
    • https://cdn.shopify.com/s/files/1/0433/8820/7254/files/dawn_of_war_soulstorm_trainer.pdf
    • https://cdn.shopify.com/s/files/1/0435/9133/6099/files/alternative_forms_of_tourism.pdf
    • https://cdn.shopify.com/s/files/1/0433/6956/2266/files/boticario_catalogo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7303/6697/files/16690292114.pdf
    • https://cdn.shopify.com/s/files/1/0437/3869/3797/files/77294297381.pdf
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/poxuzot.pdf
    • https://cdn.shopify.com/s/files/1/0436/1024/3229/files/wejoziwi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/88321221709.pdf
    • https://cdn.shopify.com/s/files/1/0434/8733/0464/files/wetherspoons_menu_nutritional_information.pdf
    • https://cdn.shopify.com/s/files/1/0432/0411/6637/files/wazefogetexubumuzukowaf.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_off00006042.bin
034f3dd65c6d03acbb4213eeca8b345526e803d7a3126d58bc5e2b0084043df8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6042 5520 bytes
font_01_sfnt_off00007319.bin
fa8467690ae3c5635ef279400aa50f5373615f11ce289e77dcf8d3c0b13b68cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7319 9636 bytes

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