Malicious PDF — malware analysis report

Static analysis result for SHA-256 de823dea9f74d944…

MALICIOUS

PDF

41.3 KB Created: 2020-08-01 12:37:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98660e0b4fac0e351b5c0447be1e2220 SHA-1: 16b03825039ae2502cdacd50829a9971be064a09 SHA-256: de823dea9f74d944fa8e041fae080ad24e84e23d17e02113818018fa283cd812
150 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, embedding numerous external links. One prominent link, disguised as "Sw airlines check in", redirects to a known malicious URL (ttraff.com). This suggests a phishing or redirection attack aimed at luring users to malicious sites. The ML classifier strongly supports the malicious nature of this PDF.

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=sw+airlines+check+in
    • http://files.counsellingpsychologist.services/uploads/1/3/0/9/130969555/7582248.pdf
    • http://files.martino1photo.com/uploads/1/3/0/8/130813317/bakizikebejusev-kilel-revopubapiki.pdf
    • http://files.keepourlexington.org/uploads/1/3/0/7/130776462/2952616.pdf
    • https://cdn.shopify.com/s/files/1/0439/3569/5016/files/xodaxukujaxeragonolo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73930450062.pdf
    • https://cdn.shopify.com/s/files/1/0430/6753/9623/files/tivusesabuwut.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0316/files/58480104945.pdf
    • https://cdn.shopify.com/s/files/1/0436/1935/2740/files/skyrim_black_soul_gem_id.pdf
    • https://cdn.shopify.com/s/files/1/0435/1442/9608/files/34215078898.pdf
    • https://cdn.shopify.com/s/files/1/0435/9811/9071/files/bamexadomanuxuzo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5351/3881/files/57318956016.pdf
    • https://cdn.shopify.com/s/files/1/0429/2473/6678/files/cookie_clicker_save_codes.pdf
    • https://cdn.shopify.com/s/files/1/0431/2753/7828/files/nukaxukera.pdf
    • https://cdn.shopify.com/s/files/1/0430/8949/4177/files/wojuwilikorireb.pdf
    • https://cdn.shopify.com/s/files/1/0438/5941/1094/files/malorututuxobulukaxeka.pdf
    • https://cdn.shopify.com/s/files/1/0429/3617/2710/files/68698255291.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_off00006296.bin
1ba127ffc202c3189f4b45b7f249e94fb7e5550a2afff6db0471aafebf4fae72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6296 5148 bytes
font_01_sfnt_off00007420.bin
791b19c9e88d9e574cf3219f3c88c82197afe69d62857a8a63d6aaf32bf7f433		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7420 10640 bytes

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