Malicious PDF — malware analysis report

Static analysis result for SHA-256 9af896989a5276ed…

MALICIOUS

PDF

94.8 KB Created: 2020-09-06 16:54:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00c83f8d3682f95bf8fbdeba32cdc29a SHA-1: 745da6c3cb4c57bd72b310f3a803feca0ce64176 SHA-256: 9af896989a5276ed0e6e3c3a8f5a4bb0706da1b94092692c7fdd4ed84787b534
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is `https://ttraff.ru/pify?keyword=star+cinema+movies`. The document body, though heavily obfuscated, contains this URL, suggesting an attempt to lure users to a malicious site. The presence of numerous external links also points to a link farm or redirection strategy.

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.ru/pify?keyword=star+cinema+movies
    • https://static.usrfiles.com/ugd/d4a9d6_b806cc291bc149f3bf24a5f8653e2561.pdf
    • https://static.usrfiles.com/ugd/fd30ac_a1d7fc768a1a4902b0c7b9ad485e5332.pdf
    • https://static.usrfiles.com/ugd/238140_ae25ce41b7794f029666291adfffe860.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_789ad8daa49042199b82eb65b2db25b2.pdf
    • https://cdn.shopify.com/s/files/1/0434/0485/3406/files/usufruct_agreement_template_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/fepelixibix.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4663/files/tanovebatabif.pdf
    • https://cdn.shopify.com/s/files/1/0434/7641/8722/files/wazaziboneletagugokilini.pdf
    • https://cdn.shopify.com/s/files/1/0434/7461/6472/files/digestive_system_multiple_choice_test_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/3345/1944/files/answers_in_genesis_light_before_sun.pdf
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/62368782282.pdf
    • https://cdn.shopify.com/s/files/1/0432/7935/1976/files/jasper_ireport_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/vizufitefujo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5717/6986/files/59692221157.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_off00012c30.bin
7a7f1c13f3277423336d9b068bc8c29becd589c7d76ee257d2b08d52b3c9c87d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C30 5076 bytes
font_01_sfnt_off00013d62.bin
c2f09889c5e45588b44aaa77966555587e334997581ee90a3e2cd8ff7ae8d72c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D62 15576 bytes

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