Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc8dfb9ae2665fbe…

MALICIOUS

PDF

41.3 KB Created: 2020-08-17 13:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96b8dfc79809827713f2bb5fa8187690 SHA-1: 7d76da19422d2b9cbf320530007e7ba7bd4dfc17 SHA-256: dc8dfb9ae2665fbec16c17a33e956d8fe576fb6b51c144eeff4ac72de8189e33
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of external links, indicating a link farm. The primary malicious URL identified is https://ttraff.cc/pify?keyword=react+bootstrap+formcontrol+select+example. The document body, though heavily obfuscated, also contains this URL, suggesting it is the intended destination for users interacting with the document. The presence of numerous links points towards an attempt to distribute malicious content or phish users.

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=react+bootstrap+formcontrol+select+example
    • http://files.dowell2c.com/uploads/1/3/1/4/131454219/3646423.pdf
    • http://files.quickfiretalent.com/uploads/1/3/1/3/131380591/7ce39bbaf65c.pdf
    • http://files.fclcpreschool.org/uploads/1/3/1/4/131452922/2524418.pdf
    • https://cdn.shopify.com/s/files/1/0434/6426/1797/files/28283813535.pdf
    • https://cdn.shopify.com/s/files/1/0430/3365/7507/files/gafalanexoxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8120/files/22002887242.pdf
    • https://cdn.shopify.com/s/files/1/0435/3874/3450/files/permutations_and_combinations_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/zogixugadojoxabidakezug.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9918/files/45920236365.pdf
    • https://cdn.shopify.com/s/files/1/0448/3710/9917/files/learn_more_python_3.pdf
    • https://cdn.shopify.com/s/files/1/0432/4294/6715/files/86893484919.pdf
    • https://cdn.shopify.com/s/files/1/0435/2868/3672/files/atmosphere_layers_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5523/files/somabodugikopumeximolivu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1750/2869/files/8288980289.pdf
    • https://cdn.shopify.com/s/files/1/0432/1230/8637/files/social_media_connection_app.pdf
    • https://cdn.shopify.com/s/files/1/0434/6000/1957/files/5e_gloom_stalker.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_off00005417.bin
590ffcb7b0e8c8d553ff3998da7ba9403421ff54f25985ad89ae40df7e9cc8aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x5417 5376 bytes
font_01_sfnt_off00006648.bin
dd8e1cf4be21442ab2c85649618d35257be5585bd858c6566fe7d712c90bd9ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x6648 16116 bytes