Malicious PDF — malware analysis report

Static analysis result for SHA-256 5780eef398356df9…

MALICIOUS

PDF

95.9 KB Created: 2020-08-02 07:15:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd86147993145cd5f35d4a9b844e5e94 SHA-1: a36e394d32bb965cc45307d108da0479ba62e944 SHA-256: 5780eef398356df99453b7b9f559e40fe7c48b34fa1a1ad35503fa45800def32
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a PDF link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=nba+teams+alphabetical. The document body, though heavily obfuscated, contains references to NBA teams and the wkhtmltopdf application, suggesting a lure. The ML classifier strongly indicates maliciousness.

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=nba+teams+alphabetical
    • http://files.evofitsuitsbyb.com/uploads/1/3/0/7/130739951/20d72e6c72c39da.pdf
    • http://files.debirestone.com/uploads/1/3/0/7/130740368/barir.pdf
    • http://files.mslangseportfolio.org/uploads/1/3/1/8/131856398/5a4a2e1f6.pdf
    • http://files.allcityelectricalie.com/uploads/1/3/2/6/132695620/bagavomejufa_kekafasapos_favimixawevi_tuxuweka.pdf
    • https://cdn.shopify.com/s/files/1/0437/4613/2129/files/58757823355.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3344/files/41580954801.pdf
    • https://cdn.shopify.com/s/files/1/0435/2281/8200/files/41341214283.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pazobezosajage.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/8358139273.pdf
    • https://cdn.shopify.com/s/files/1/0434/1376/6293/files/25175129927.pdf
    • https://cdn.shopify.com/s/files/1/0430/9375/4009/files/jedenepumigijezu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6529/4491/files/faxirele.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/55027613919.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6133/files/bamepumepunokedan.pdf
    • https://cdn.shopify.com/s/files/1/0434/8359/4917/files/3438362723.pdf
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/16882462718.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_off000130de.bin
e2a94accc7125aa63490b476925675616392ddcdbfbc209782e4dcd76cf7820d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130DE 5188 bytes
font_01_sfnt_off0001425f.bin
605cf22de446b1336227645b12568c24f4befb9739ad5976721f28f69da07214		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1425F 15860 bytes

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