Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ea2a3616446af61…

MALICIOUS

PDF

46.6 KB Created: 2020-08-19 01:40:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99409697f8540f43c3dddfb2316d67ce SHA-1: c46e24b93790e4abe1fac503a10456e16e06c6ac SHA-256: 4ea2a3616446af61848969d71d7c1f258713dcf08fe6004d11c6b546855ee860
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious payload. The document also features a large number of external PDF links, many hosted on Shopify, suggesting a link farm for SEO poisoning or to distribute malware. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious redirector and link farm indicates a phishing or malware distribution 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.com/pify?keyword=iv+cannulation+sites+pdf
    • http://files.becuriouscuisine.com/uploads/1/3/0/7/130739674/zororuxujedimo.pdf
    • http://files.swaptimeusa.com/uploads/1/3/2/7/132741429/dedokopobatokoz_setudiwapate_supedopuwamedip_wuleno.pdf
    • http://files.nokillhuntsville.com/uploads/1/3/1/4/131455883/jalupi.pdf
    • http://wafukane.stvincentdepaulnewhope.org/uploads/1/3/0/8/130874493/pegobunexi.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/senobitapasof.pdf
    • https://cdn.shopify.com/s/files/1/0431/9117/3278/files/geluvuxoxus.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/pekonolejova.pdf
    • https://cdn.shopify.com/s/files/1/0439/4074/1275/files/57847113562.pdf
    • https://cdn.shopify.com/s/files/1/0435/3572/8794/files/84008132721.pdf
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/nitrogen_generator_atlas_copco.pdf
    • https://cdn.shopify.com/s/files/1/0434/4496/1436/files/rimano.pdf
    • https://cdn.shopify.com/s/files/1/0437/6517/0334/files/american_english_file_4_student_book_pdf_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/1722/3847/files/67309849551.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c60.bin
4a58a70bac906111e714a6c7de4f1dc19b2875e6d532575c073a3a34d811ee80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C60 4932 bytes
font_01_sfnt_off00007d37.bin
5915925b63f5152e2a72d8ee44ac1452450e1d79f0480062651fbbb9bf2290b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D37 10060 bytes
font_02_sfnt_off00009f91.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F91 4324 bytes

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