Malicious PDF — malware analysis report

Static analysis result for SHA-256 8472fbc2c371f488…

MALICIOUS

PDF

32.5 KB Created: 2020-08-31 03:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc01c0cca8a46e7b93f73960fd40c9cd SHA-1: 5bab93e1deaec9608826068c65d82cc92337d423 SHA-256: 8472fbc2c371f4887acaff13afa891d7cf1a41d570bba028722f2145eada7ceb
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of embedded external links, suggesting a link farm or redirection attack. The primary malicious URL identified is ttraff.com, which is known for malicious redirection. The document body contains text related to lyrics and application metadata, but the core malicious functionality appears to be driven by the embedded links.

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/wix?keyword=gatatumba+lyrics+in+english
    • https://cdn.shopify.com/s/files/1/0437/2883/0625/files/zaguki.pdf
    • https://cdn.shopify.com/s/files/1/0433/5465/2822/files/latin_bass_book_oscar_stagnaro.pdf
    • https://cdn.shopify.com/s/files/1/0427/4061/3286/files/happy_birthday_atharva_video_song.pdf
    • https://static.usrfiles.com/ugd/aff7ca_d577361392cf4165a098a24d1de88411.pdf
    • https://static.usrfiles.com/ugd/b58d21_f70dce06af5740658b4372e4b36e39a8.pdf
    • https://static.usrfiles.com/ugd/cf14a4_2137bf14d8a5411688c9527fe81b2d28.pdf
    • https://static.usrfiles.com/ugd/1f5cef_8bb062c279aa4f8e98c6075f33214ae9.pdf
    • https://cdn.shopify.com/s/files/1/0431/6738/3712/files/financial_appraisal_methods.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/zeta_addressable_fire_alarm_system_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/4996/5985/files/zudur.pdf
    • https://cdn.shopify.com/s/files/1/0434/6383/5814/files/pivozisixasodip.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3130/files/26282301732.pdf
    • https://cdn.shopify.com/s/files/1/0432/3088/8103/files/oxford_english_to_english_and_urdu_dictionary_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/1392/2206/files/filenugivox.pdf
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/zutijex.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_off00004456.bin
dacbebf4e5536566b80f86631c65d0e5492e8e9469f828072d967e0130fbeabd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4456 5488 bytes
font_01_sfnt_off000056e1.bin
836f31248b1cabd496f9c2684a0d560cefb2efa169198ac1cc47f9bc2a270044		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56E1 8952 bytes

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