Malicious PDF — malware analysis report

Static analysis result for SHA-256 74dce6f5cfbd5bac…

MALICIOUS

PDF

39.3 KB Created: 2020-08-31 03:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb878911c18e9e78e25ec81f9aa976ac SHA-1: 1637015d1fb46c8e5dd6cce0f92d6bfebaa0576c SHA-256: 74dce6f5cfbd5bac734ca1c4515613f3eb82c3069667ad8e9390d3450306900d
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, ttraff.com, which is likely used to distribute further malware or phishing content. The document body, though heavily obfuscated, contains text related to 'timber mp3 download free', suggesting a lure to entice users to click the malicious link. The presence of numerous external PDF links further supports the classification as a link farm, often used for SEO manipulation or to host malicious content.

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/wix?keyword=timber+mp3+download+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_9d3e9abb2b6948a4a38ce6d4ba5f8abb.pdf
    • https://static.usrfiles.com/ugd/33a16d_0ad384b06f0a44b8ae4dc6ce0ba25094.pdf
    • https://static.usrfiles.com/ugd/ce5d00_96262a8c7ceb4f23a4d3e814fe39bc47.pdf
    • https://cdn.shopify.com/s/files/1/0434/0649/1797/files/vatulu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7652/5984/files/43546617981.pdf
    • https://cdn.shopify.com/s/files/1/0433/8253/8403/files/56093040765.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/letexebomibobupigarubuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/56278712590.pdf
    • https://static.usrfiles.com/ugd/078c79_3256caecec3c45458c6eb04f4001d205.pdf
    • https://static.usrfiles.com/ugd/cf14a4_ade474c3de694ca1b545c854c06700b4.pdf
    • https://static.usrfiles.com/ugd/24853a_f816166726c44ca8a8053e9c694a2bd7.pdf
    • https://static.usrfiles.com/ugd/b8c837_06205787d8f742418bc3961336617df3.pdf
    • https://static.usrfiles.com/ugd/696b8a_2c16a5ee1edb430888fce2c6fcce6c24.pdf
    • https://static.usrfiles.com/ugd/26481d_5e3c92a1d78841e9a6c6f80f8588d6a1.pdf
    • https://static.usrfiles.com/ugd/33a16d_a5277ecddd90427bb05e739214060e28.pdf
    • https://static.usrfiles.com/ugd/de60da_5c68a1e9cb984f49bb251027f2bd4530.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c96.bin
1fb71a16f385704818e899c1249d301e3c9b48f7f84980aabf00f64bd81928b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C96 5356 bytes
font_01_sfnt_off00006eb9.bin
abcb5bb3bcce24a4bed319b201f981e5b99783b9850e85b51e08c1ffb799f798		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB9 9780 bytes

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