Malicious PDF — malware analysis report

Static analysis result for SHA-256 b93bd1b5cbe1f14f…

MALICIOUS

PDF

39.6 KB Created: 2020-08-19 13:23:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf62265b9714952fe907251390a4f113 SHA-1: 1db54f93977a47c7f4d54f92c851399c94c2ab5a SHA-256: b93bd1b5cbe1f14f9fc2caf27713516b6cdd82b2aae07f2ebb5cf35535ec4fe1
150 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, disguised as a Canadian immigration application form. This is further supported by heuristics indicating a malicious redirector and a link farm, suggesting an attempt to drive traffic to malicious sites. The ML classifier also strongly flagged this PDF as malicious.

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=canadian+immigration+skilled+worker+application+form
    • http://files.fbcpercy.com/uploads/1/3/1/4/131454549/rutatisixixuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/0413/3525/files/vupuwujum.pdf
    • https://cdn.shopify.com/s/files/1/0434/8392/2585/files/starting_out_with_java_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/8947/7273/files/baccharis_articulata.pdf
    • https://cdn.shopify.com/s/files/1/0431/2095/1450/files/fizimisagidirojumokoza.pdf
    • https://cdn.shopify.com/s/files/1/0431/7783/6702/files/zenagowiwebugebone.pdf
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/hoffman_hematology_7th_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/5036/8152/files/fupideguvebarizewini.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/laruruwoxopez.pdf
    • https://cdn.shopify.com/s/files/1/0430/0849/1673/files/nutolugixe.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_off00005cd7.bin
af0073385b5ee88857cfc12808399170c2a8d8f169d6575bc5e22ad2ad8e024d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD7 5536 bytes
font_01_sfnt_off00006fab.bin
80ed08acdf5cac2df7b161ee586a1549ce1502ebe4bde3ec780197cd75c078e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAB 9956 bytes

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