Malicious PDF — malware analysis report

Static analysis result for SHA-256 a48a8d3b7e0aac05…

MALICIOUS

PDF

45.8 KB Created: 2020-08-30 04:40:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afb2bae29387245f2a141acd1ae56668 SHA-1: a84c2fcd68713ad0f7ccdd80dffbad967b7f5d9d SHA-256: a48a8d3b7e0aac057ae183ee27ba304fbd46c42d734485d456d5edb88330043e
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is likely used to lure users into downloading malicious content or visiting phishing pages. The document body, though partially corrupted, contains the same URL and keywords suggesting a lure for free downloads. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, potentially for SEO poisoning or to obscure the malicious redirector.

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=es+epico+canserbero+descargar+gratis+mp3
    • https://cdn.shopify.com/s/files/1/0448/2826/2560/files/42440198761.pdf
    • https://cdn.shopify.com/s/files/1/0428/1414/4675/files/adjectives_with_ed_and_ing_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/4914/7803/files/jolosajizegamufo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/37716489241.pdf
    • https://static.usrfiles.com/ugd/9421c8_39efa8161d244b3cadc1053c5cc1f3b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_33ace708e8524835b9e9b6d815723726.pdf
    • https://static.usrfiles.com/ugd/77d535_14ffbd2fde5747bb8484356de006c2ce.pdf
    • https://cdn.shopify.com/s/files/1/0430/9506/4733/files/albanian_people_s_army_uniforms.pdf
    • https://cdn.shopify.com/s/files/1/0433/7664/0156/files/zeludikutemigebidi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9196/7646/files/41937366267.pdf
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/adobe_creator_free_trial.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9787/files/afcat_2_question_paper_2020.pdf
    • https://static.usrfiles.com/ugd/b8c837_f17c6554e1ce4a27b2ea7a8688aa29ca.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_93c86efcc5294a03a8317f23a29d4ada.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_off00006c6d.bin
c557d34b8a9c18bde7fcfd41c4910276d5f89496c4c63062bcb006e5631706af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6D 5624 bytes
font_01_sfnt_off00007f73.bin
90ca0485cbcc6a5a5cb2a02c5355e0037c4a3d53af65f075acf54df01e037bd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F73 13356 bytes

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