Malicious PDF — malware analysis report

Static analysis result for SHA-256 f280ff7dbc9ae40f…

MALICIOUS

PDF

42.4 KB Created: 2020-08-31 16:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0394fe88141aae712835b282fb3b53f SHA-1: d617f1a5b7c2ff8803b4321fff1d0ce01a975c69 SHA-256: f280ff7dbc9ae40f2ea9abddd62788dede3a859fea7923030d36fc83ae5b4876
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL and keywords related to celebrity salaries, suggesting a lure to a phishing or scam page. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a deliberate attempt to drive traffic to malicious sites. No scripts were extracted from this sample.

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/wix?keyword=shia+labeouf+salary+transformers
    • https://static.usrfiles.com/ugd/b8c837_2b14eb682f704021adc5dfbf9910e8c5.pdf
    • https://static.usrfiles.com/ugd/4bb894_453c2a05d3084a87b54282470f0a9a4a.pdf
    • https://static.usrfiles.com/ugd/b8c837_eceaa00d0e2d4ebd8888d8e36a723509.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/zulodil.pdf
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/wetherspoons_christmas_menu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9170/5500/files/estadistica_para_negocios_y_economia_anderson_11_edicion_solucionario.pdf
    • https://cdn.shopify.com/s/files/1/0428/4484/8295/files/wesaxasinaraximuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8011835234.pdf
    • https://cdn.shopify.com/s/files/1/0434/0652/4566/files/wasufazezefovewimegozeko.pdf
    • https://static.usrfiles.com/ugd/b11f6d_6b197790737e4c569efebf214251b08c.pdf
    • https://static.usrfiles.com/ugd/430cb2_8dc704efb60e40d0ae1d3090fdc84ee2.pdf
    • https://static.usrfiles.com/ugd/69695d_58261a262a6b4de082f55da5163d5225.pdf
    • https://static.usrfiles.com/ugd/538d67_83ec0b578e924299bc316bb7d53cf1b7.pdf
    • https://static.usrfiles.com/ugd/b8c837_78952e12e6b24859b52aeaa7d4284209.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_off0000670a.bin
d051bb28736e30c101b5e04dad694e565d53f04d801e9542fdddd1d7238b701b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x670A 5352 bytes
font_01_sfnt_off0000791a.bin
fc66f9a9b39cd6d381e2f6eb21dfcbb1e80a5719483f90df4dbd630ec32be807		 pdf-font-stream PDF embedded font (sfnt) at offset 0x791A 10528 bytes

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