Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb1cbb8915dd39c…

MALICIOUS

PDF

80.2 KB Created: 2020-08-01 22:13:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec861d76a731bfaf56bf103fe56f0d08 SHA-1: 76953e31d81419b5fef224db0777ab619a417835 SHA-256: 6eb1cbb8915dd39c21d37037db974996d5f10e172c93aade9e3cdb796d2cc311
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a link farm, with numerous external PDF links. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the redirector link suggest an attempt to lure the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=cabal+online+eod+b1f+guide
    • http://files.localeyeonline.com/uploads/1/3/1/3/131383892/pivaxoxakoderiv-lekorawu-rijelib-zetaxowafut.pdf
    • http://files.helpingownerswithpetexpenses.org/uploads/1/3/0/9/130969399/tofunizosafidamufomi.pdf
    • http://files.herbyagnew.com/uploads/1/3/1/6/131636644/kaposasuvibofeb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/3839/8869/files/michael_myers_theme_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/sekaze.pdf
    • https://cdn.shopify.com/s/files/1/0440/3894/6966/files/tefutafu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9944/6693/files/bulituvematujulefirejidi.pdf
    • https://cdn.shopify.com/s/files/1/0435/1302/0570/files/vaveleninorexef.pdf
    • https://cdn.shopify.com/s/files/1/0433/9567/8359/files/59014455782.pdf
    • https://cdn.shopify.com/s/files/1/0434/6498/2693/files/polelufuwigivifakobotegaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6341/0845/files/80655417912.pdf
    • https://cdn.shopify.com/s/files/1/0429/3568/1180/files/35777446016.pdf
    • https://cdn.shopify.com/s/files/1/0429/3053/6614/files/how_to_add_to_hosts_file.pdf
    • https://cdn.shopify.com/s/files/1/0439/4529/6027/files/free_twistys_account.pdf
    • https://cdn.shopify.com/s/files/1/0439/8622/3262/files/lujusofuwoku.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e622.bin
5cb446d03daa636a5a691aac25031f1e6e4ad67d809669fe098a553ab8e6a755		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE622 3840 bytes
font_01_sfnt_off0000f3ee.bin
9efd0673545846e8b3f8cbc377f7195246d1d22909f7e867022a57be9b3fb210		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EE 4900 bytes
font_02_sfnt_off000104b3.bin
4c5d13da7b13af47607560eef3e36133a9eac952e21224fd64bb959433c1b207		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104B3 15084 bytes

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