Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a81381c42eeeec2…

MALICIOUS

PDF

50.3 KB Created: 2020-09-01 01:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06db5deccb32e602823134aa00d71358 SHA-1: 33102bd45e1521abd2a251ccba824bd8605d0247 SHA-256: 7a81381c42eeeec2b928bf539fa3c5e5d3df4da3a585d62204482779c5aa0e3f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, a common tactic for SEO spam and phishing. One prominent link, 'https://ttraff.cc/pify?keyword=aws+cloudformation+bastion+host', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and references to AWS CloudFormation, suggesting a lure to a malicious site. The presence of a link farm heuristic further supports the malicious intent.

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=aws+cloudformation+bastion+host
    • https://cdn.shopify.com/s/files/1/0432/0677/0849/files/causes_of_asian_financial_crisis_1997.pdf
    • https://cdn.shopify.com/s/files/1/0429/6297/6921/files/zemumijilalubinidufivaxi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1740/3549/files/accuweather_evansville_in.pdf
    • https://cdn.shopify.com/s/files/1/0429/9299/2410/files/da_form_7223_bullet_examples.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9588/files/camara_icsee_manual.pdf
    • https://static.usrfiles.com/ugd/b8c837_abc924ab436a478fa42cac534a7d5361.pdf
    • https://static.usrfiles.com/ugd/d5d855_1c4cbd575fa0466fb2cb3f023da0ec27.pdf
    • https://static.usrfiles.com/ugd/63022f_ce8f89b02dc24ea0bcd1c0a5bd2def06.pdf
    • https://static.usrfiles.com/ugd/c618e9_7358cc5395594a9aa110d9cd5aeb10a6.pdf
    • https://static.usrfiles.com/ugd/02beb7_482dc261ff4844ca98a9d6d822a824cb.pdf
    • https://static.usrfiles.com/ugd/a2d007_0d436ece37c64a21a337709331e72f29.pdf
    • https://static.usrfiles.com/ugd/857e61_446b60c06fab46e1910f5a192dbed705.pdf
    • https://cdn.shopify.com/s/files/1/0432/9930/7688/files/certificate_design_background_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/6381/3020/files/lewoxenuwesavuraves.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zosogorimojafi.pdf
    • https://cdn.shopify.com/s/files/1/0447/6325/0839/files/vhse_entrepreneurship_development_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0434/1009/6284/files/segekawakagaro.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_off0000817c.bin
d882642653dd9f6e42486f93c4105251f6f1d50529160dbc3199acd6fc714e45
pdf-font-stream PDF embedded font (sfnt) at offset 0x817C 5480 bytes
font_01_sfnt_off00009405.bin
371e7c11a11b6dad699b77acf4ef6a50b9fed6a1e5e7bab01576bcdb07ac92e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x9405 12684 bytes